It's so typical of a bad player like you. Instead of dealing with your own lack of skills, you just start to insult other players just because they can actually handle to play the game without training aids.
Only noobs are tab'ing in M+. But you have probably never done anything much higher than a +10 key have you? Even though you play a brain dead BM Hunter.
I bet you have never heard of mouse-over macros for interrupts and CCs either? Or focus-interrupts? That's how good players handle M+. We don't need to tab-switching between mobs to handle explosives or interrupts on important targets.
It's fair enough that you want to play WoW with training wheels on, but don't call me a keyboard turner just because I'm a much better player than you and I can actually handle using my brain to target the right mobs.
Soon, BM hunters like you will probably complain that you have to move your characters yourself.