Its the logical result of turning M+ into an e-sport.
'Normal' players see actual 'good' players do highly optimised and practised routes and want to be like them and repeat what they do without the coordinated and practiced group used during the MDI.
Whenever a game shows players how they 'should play' more casual players will try to emulate it and fail. No different from LoL where silver/gold players pretend they are playing on the Worlds stage.