No raid day 1 makes me extremely happy. I'm not even trying to be selfish since I can't play it the first week but it makes sense for a pretty easy reason, imo:
Content!!!
Every expansion so far, you get through the few missions and strikes and go right to raiding/PoE. Then when you're finish that day or the next day, you've literally played everything. You then do it 3x. You've done everything in 1 day, multiple times. Obviously many if not most people got tired of that after the first week or so.
For some reason a lot of Destiny players seem to be in a rush to complete everything as fast as possible. I don't understand that philosophy.
Not having raid day 1 means there's more content! Enjoy the new subclass + stories and missions/strike, revamped strikes and new PvP modes and maps. Not to mention all the tons of new weapons. There's a whole new part that gets unlocked when hitting 40. People are underestimating what it'll take to get from 34 to 40. Should be a pretty big xp gap.
Also, you won't have max weapons and light gear ready for raid which is GREAT. I don't want to have maxed gear ready to kill the final end game content of a huge expansion on day 1 or even that 1st week. It needs to be an ADVENTURE to get to the finale, the raid, and it sounds like it is.
There's no rush! Enjoy a huge expansion. When it comes out, you won't even think about the new raid not being unlocked yet because you'll be enjoying the heck out of all the new stuff.