Dave's such a hater. He won the belt. He's defended the belt. Hard to say he doesn't belong there.
Forget about his pro wrestling. Remember his collegiate wrestling. You can't say he didn't work hard. He busted his butt to attain his collegiate wrestling skills and his strength. You're not just born that big and strong. Also, even though pro wrestling has the outcome decided, that doesn't mean it's not hard work. The man worked hard to be a great wrestler. He worked hard to achieve his fame as a pro wrestler and he's working hard to be a great UFC fighter.
He doesn't have to live up to some high moral MMA standard that some of the fans have created.