Tanks that want to take it slow?

[Canadane]

This might be out of nowhere but I feel like if dungeon design was different, the debate of tanks taking things slow wouldn't be as big of a deal as it seems to be.

Dungeon design was different back with the ARR launch.
Sac pulls were the norm and you'd end up killing nothing because it was faster to let the tank die at the boss room door than it would be to kill things. SE eventually starting putting in gates to stop this as you'd need to kill things to progress.
Players will always find the best way to speed things up, especially when they gotta go do the same place over and over again for some reason or another.