I don’t know what to tell you. The warrior tank I frequent groups with struggle to stand in place and tank because he’s taking too much damage. And the main problem is that he’s forced between mitigating damage or doing damage because of rage issues. If I’m not in the group or one other friend is not in the group for mythics, he has to kite tank because there’s some serious dps deficits to quickly clear out big aoe groups; not even that they’re bad but because they’re not really classes with great AoE’s the way some of the meta classes are.
And the warrior I frequently play with has been playing WoW for over a decade, and not just playing WoW. He’s the type of guy who makes every tank classes and plays them all.
The enlarged difficulty is something you absolutely face especially from 7+ when there are more affixes but it’s not just necrotic that kind of forces you to kite tank. People were complaining about it from the beginning of the expansion.