That has worked out great hasn't it. I'm sure the elitism, exclusionary behavior, and flaming is good for the community of the game.
And you can't seem to think outside the "WoW-style raiding" box. All your arguments assume "WoW-style raiding".2) If a class is underpowered it will be "sat." Let's look at bards. The general opinion is their dps is underwheming and they are kicked from groups. AST, are kicked from endgame goups because their heals are weaker and do not have reliable utility. In 2.4-2.5, SMNs weren't wanted in endgame groups because they
weren't as good as BLMs.
3) If something is OP, then it will certainly replace the class with the same role. That's why a lot people want DRGs for a melee spot. BL is a giant dps buff with a pretty low CD.
4) Then why have something if it cannot partake in all content. It is pointless developing time. If jobs are better than the "customizable" class, no one will use them.
From reading your previous posts, it sounds like you haven't played many mmos. What you want have existed in mmos before and they always end the same way.
Non sequitur.
Difficulty is independent of whether the entire group takes the fall for the failings of a few or it's just the individuals that fail that get punished - e.g. Bloodborne, a single player game, has no "group" at all and is in no way easy.
No the worst that could happen in any game is you not achieving your objective.
The current system makes it such that if a few players in the group are incompetent, everyone fails their objective.
It applies to CT/ST/WoD as well. If a few DPS fail to do mechanics, e.g. run to pad in CT final boss, everyone dies.
Having to deal with the failings of other people isn't "difficulty" or at least isn't the good kind. It only leads to frustration and inevitable toxic behavior when you lash out at others for "being bads".
Ideally group content should allow players to help one another achieve their objectives but not allow one another to "get in the way" of each other's objective, either intentionally or unintentionally.