The point you're missing is that people want to play mythic level content (eg the only content in wow that still have a relevant difficulty and a decent number of mechanics) while it is relevant (eg not after a new raid tier has been released and the content outgeared) without having to commit their life to farming outside of raid. When 99 % of the game is for casual players and the 1 % at a relevant difficulty is gated by an insane amount of grinding, people who are after difficulty and aren't pro are being excluded from the content.
That's the reason why pots farming was nerfed in TBC, and everyone was happy about that.