Yeah there are a ton of KWTD, but if you pay attention you will see a lot of teaching posts after a few weeks.

Watch a video then, same thing. Nobody is obligated to teach you

I think its more the fact that the casual raid scene is dead. Raids now feel like something out of WoW where you can't have fun or make mistakes without hours of effort being lost. That or the mechanic hell that bingo bungo have a hard on for. Seriously do we need 7 bloody different mechanics for the last boss when most players that aren't super raid competitive or streamers have already had enough stress from at most a 2 hour run if they are first time runner? What happened with raids like VoG, Crota, Wrath of the machine, hell even the Calus fight was simple, but challanging. I mean there is a reason people cheesed Riven, because they wanted a fun badass boss fight not another complex puzzle. :/ Now they aren't super bad when you do learn them, but then it kills the drive of any new players have to bother since it seems like so much is being thrown at you all at once. So it kills the raid community in the long run because its become more hardcore, meaning that there is a significantly massive decrease in the raid population due to no new players trying them. Heck maybe bring back the old Easy mode Hard mode system. Then all they have to do is just reskin the hard mode weapons and add a intrinsic or unique perk to them like the bane perks from the old days that or the raid they are from they do more damage in. Kinda like the Leviathan armor benefits. All in all, I think the lack of definable loot, current views and learning curves, and as well as mechanic inflation tend to kill fun casual runs until experienced players pull unsure friends or randoms into the raid and take a few hours to teach them.... Which rarely happens. We are back to the D1 days of "No Ghally get kicked" mentality.