Yea but for taunt, when you get hit you just attack it. For Bully, when you get hit you can't do anything unless you have a non-damaging move, which limits coverage and leaves offensive completely vulnerable. Besides, what's to stop something from just spamming Bully with entry hazards up? Status moves other than Toxic aren't going to be doing much. You'd need a MH taunt if the opponent has a scarf.