Of course being careful doesn't always save you, especially when facing new areas and enemies, but you certainly have a more high chance of success with that approach. If you had killed the little spiders first, which you had already dealt with previously, and then went to retrieve the echoes, there would have been no enemies following your trail. They're very easy to kill one by one, and quite a bit harder when you've awoken them all by running beneath them.
Well, that's the unknown bit. Yes, I could have faced them and taken them down, but I haven't found the exact trick to that area yet with the giant spider having killed me 3 times before I managed to take him down. So if I had stayed, if I had slipped up, I'd have died even a lesser distance than I did before then.
Conversely, how was I supposed to know that their path wouldn't have redirected them before out of the building? If by chance that's what that had happened, then rushing past DEFINITELY would have been the wiser decision.
And to add another layer to this, the specific reason I lost was because I actually decided to turn back. You see, I had just gotten outside the door, and I just turned back to see if they were following. They were, but I figured I could take them out as the funneled into the doorway. I got a lot of them, but they eventually pushed through. But what if I hadn't stopped and tried to fight them? Maybe their path way ended just after the next set of doors, which I was close to? By that logic, you could say that my mistake wasn't not being careful, but rather that it was not sticking to my original decision to rush past.
And to add yet ANOTHER layer, I tried a different route. Rather than rushing past the middle of them, I went up the stairs on the right, killed the single spider in the hall way, walked out on the bridge, jumped down and ran out. The spiders all fell to the floor, but I guess because I left before they had a chance to turn their heads to me, they didn't chase after me once I made it out. So this seems to be the objectively safest way to get past this area, assuming it works consistently. How convenient this knowledge would have been if I had known it earlier?
The name of the game of BB is knowledge, and you only do that by experience and sometimes that involves you dying. I don't want to say it's trial and error, as I feel that's something of a trigger word around here, but it is trial before all else, and sometimes you you only discover what works and what doesn't through error.
When I was in the Forbidden Woods, I didn't know what lied ahead either, and I got killed there twice. I managed to reach the blood puddle on the second time, but died shortly afterwards. So, on the third time I had no idea what lied beyond the puddle, but a careful approach made me victorious, and got me 90k blood echoes.
Great. That's happened to me too. That's also failed me before as well. Rushing has aided me. Rushing has failed me. I'm not really sure what your point is here. Yeah, taking that approach could have worked. Or the spiders could have killed me through some slip up. I'm not disputing that your approach could have saved me. Like I point out above, the situation could have gone in any number of ways, and there's no way of really telling whats going to happen until you actually try it, and there's nothing here that suggests to me that what your saying is a more reliable plan of action than a number of other things I could have tried.
There's nothing wrong with farming. I've done my share as well, although not quite as much as 4 hours in a row. The funny thing is, that the Mensis farming round would have granted you more echoes quicker than the Lecture Building.
I was doing it at the Unseen Village chapel. Maybe it would have, but before that happened, I'd have had to get to that place, learn the enemies there reliably enough for them to be grindable. And I was probably making 50,000 echoes every 15 minutes or so. I grew 15 levels I think.
The reason I don't regret it is because I had intended to stop, but it was so easy to just get to the next level. I'd finish off the whole area, with 50,000, and I only need 60,000 to level up? Okay, then use Hunter's mark to awaken at the lamp, 7,000 over the next area. Okay, so I just need to take care of the beast downstairs, and I'll take care of the other one while I'm there. Now I have 67,000, oh, I guess I'll just go kill the cramped corpses to get a bit more for fire and bolt paper. And then all of a sudden I'm at 100,000 and only a few thousand away from leveling up twice, so having cleared the area, I use hunter's mark, and the pattern repeats itself.
So it was one of those cycles where every time I went through, the next reward is such a small amount away that I might as well just get it. I get the next level, then I get more for items, which puts me right next ot the next level again, and then I want more for items again, which puts me within reach of the next level again... When you want to quit but can't, that's when grinding is tedious. This grinding was something I probably should have quit before 4 hours, but I didn't because I didn't want to. It was the fun kind of grinding. It's not novel or exciting in the traditional way, but it's satisfying because you can visibly see progression being made after nearly every area. If it was as tedious to me as you seem to think it'd be for you, then I'd have just stopped as soon as I got what I needed.
As for a better grind area being available not long after here, that's fine. I mean, am I supposed to look up the whole game's information ahead of time so I know when not to do something? No, that's poisons the sense of discovery completely and the only time I had used it, it utterly ruined a sidequest for me. And really, I could just logically deduce that there is going to be a better grind spot somewhere or another. That's how the game works, the deeper you go, the higher the echoes. I grinded a spot that yielded the amount I needed to get higher. Isn't that all that matters?
I rarily try to beat enemies that seem harder than the usual ones, like the Executioners, when I'm carrying a good amount of echoes. If the chance of success seems questionable, I may just go around the foe if possible, and return there later when I'm not carrying that much of them. That being said, after a certain point losing <100k echoes doesn't feel much at all. You get more and more as you progress, and you need more and more as you level up. I can get +290k of them in the Mensis route on NG+ in 3-4 minutes, but levelling up takes ~300k at this point.
Other than the executioner shuffling around in Central Yharnam, most enemies seem to be in the way as I went on, meaning you have to go a fair bit out of the way to avoid them. So generally, I approach stronger enemies cautiously, and actually come out on top more often than not. Though yeah it's typically better if you are empty of souls when that happens. But again, new enemies, you're not going to know how strong they are. A weak enemy might look strong, or be weak but have one attack that will destroy you, so...again, you can be cautious as you want, but sometimes that just backfires because you don't know what to be cautious for, making recklessness be the more effective measure at times.