There is a lot of Ad Hominem when this issue is addressed. Attacking the players instead of the argument with a poor rebuttal; "Just get good", when evidentially the best players still find it a complete ball ache.
Overwatch was created around the idea of fun, floating cars, infinite ammo, vibrant colour palettes and short respawn were all apart of the grand scheme, so if the majority of players find it anti-fun to have a must pick healer, their pick being unpicked or even the mains who hate it themselves, no amount of logical fallacies and name calling is going to stop it.