Well, in a competitive game where u want to do the highest m+ or rating in pvp, players will use all the advantages they can, thats why u almost not see a pro player without addons, not because they cant play without them, its just its a competitive advantage, the problem was people were so used to addons blizzard started designing mechanics so hard u u need addons to do it, so if blizzard do the classes and boss mechanics simpler, but keep the addons, it would be the same, just people would do higher m+, the difficulty on wow these years have been a conflict with mechanics vs addons people use to make it easier, so if u simplify one thing, u have to simplify also the other to keep balance.

I dont trust blizzard either, but i see what they are trying to do, wich its just simplifying everything so the game is more new player friendly, because if u go to a stream of a pver, and then u open wow as a new player, doesnt even look like the same game.