You have 90 minutes for a dungeon. So if you cant make it in this time, you fail. Everything else is success, just to varying degrees of exceptionalism. We are all pretty exceptional, anyway. Also, the game does not require me to play a good rotation to clear all content. Why would I ? Maybe I dont want to be stressed out, playing correctly and without creativity and fun so we clear 2 minutes quicker? Sometimes I am already so bored from the hour-long DPS queue, I started a movie and some good scenes come up, so I might prefer paying attention to that, because you know, its MY leisure time to spend as I want?

Healers dont DPS, tanks dont DPS, so why should DPS perform to the maximum of their abilities? We ll get through the dungeon, no worries, stop annoying me.