In the DPS race, DH may have the upper hand...
But no amount of pew pew is going to be as satisfying as leaping into a horde of enemies and cleaving their heads off with a Barb, or a monk rushing through an entire ARMY of enemies in a split second then one shotting their summoner, only to turn around and send his entire army flying against the wall with a swift sweeping roundhouse.
It's just inifinitely more fun than pew pew.