"You pull, you tank" is a bad mentality

[TBerry]

But yes, the tank is just an NPC and there is no fault of your own that YPYT is a thing in the first place.

Tanks are not the de facto puller. They are usually the puller, yes, but anyone can pull.
There isn't any etiquette to respect here, other than the roles as assigned.



This is the ideal, yes.

There is etiquette but you choose to ignore it.