Fact: The man has destroyed legends of the sport. No other LHW in the division could go on the run he's had. None of them, hence why the belt changed hands nearly every time it was defended (since Liddell).
Fact: That makes him really damn good, and that's coming from someone who doesn't care for him a whole lot (though I love to watch him fight).
Opinions don't really matter when there's clear and indisputable evidence to prove that, in fact, JBJ is a helluva fighter who is worthy of the praise he gets.