Because it goes against the core concept of being a souls game. If you think Souls is about difficulty, then you got the concept wrong.
Wait, if Souls is not about difficulty, why even make this thread? (I know you didn't), what I mean is, if it's not about difficulty, it shouldn't even matter if a game adds more difficulties, but here we are.
i have issues of how design choices affect the experience for me.
Here's another example for you.
The Gothic series is great for the way it handles progression with sparse upgrades and very few mutually exclusive options of what factions to join.
Should I buy the bullshit that having fifty more options, ten times more loot and the ability to join every faction without consequences and drawbacks would make the series better because "more options are always better"?
Or can I call out retardation when I read it?
And here you've lost me. They haven't changed the original Normal, which is now called Challenge and is available at the start. So, the design choices they made are still there for you. The Gothic example doesn't do anything for me. Is the game balanced around more options, more loot, etc? If it's not, then the game designers have simply failed (or felt like taking the game in a new direction, which may or may not be well received by fans, just as it happened with Dragon Age: The Veilguard). Quite a few people in this thread have mentioned that this most likely stems from the fact that the devs must have seen most people are playing in Easy (and I'd guess that even then, a significant number is not making it to the end of the game) and believe they made the game too difficult for what they thought the average player of Khazan would be.
So, cue a new, easier difficulty, that I guess will actually be useful for those that want to just play through it for the story, the original "normal" being renamed as Challenge, and a harder one above it which, looking at the changes they've mentioned where you are even more restricted in what you can do, they added because it sounds like feedback from veteran souls-like players as something they'd like. From the outside it looks like they're trying to reach more players, sell more games and, you know, have a profitable bussiness. And your conclusion is that they shouldn't do that... because more options are bad. Instead I guess they should simply close the studio, get told to "git gud" and chose a different career. It's just hard to agree with your argument when you're trying to make everyone believe that only souls-like games shouldn't have more than one difficulty and that every developer out there is capable of hitting a perfectly balanced difficulty (not even From can do it, because every player will understandably expect something different from the very same game).
I love souls-games and I will play this one in Challenge difficulty when I get it, but I can't blame a studio for trying to make their game profitable and more attractive to the masses.