As a BLM I'm used to pulling hate on trash mobs with an undergeared tank, and I don't mind. I'll fly into the pack and keep going. The thing about overgeared dps stealing hate is that they also kill stuff fast.

Bosses are different; all a tank has to do is blow up offensive CDs and hate moves at the start, and even a 100 weapon tank can hold hate for the fight over BiS dps.