Cause Aoki sucks. Face it Aoki outclasses crap opponents in Japan cause the refs let him scoot around on his ass. Aoki loses to even gatekeepers like Joe Stevenson in the UFC because the refs won't favor him the way they do in Japan. Plain and simple Aoki would fall out of the top 10 completely if he started fighting full time in the US.
You're in the clouds if you think Joe Stephenson beats Aoki. And the "ref favortism" card is a joke.... I saw him bootyscoot Alvarez to a heel hook but I've seen alot of Aokis fights and he's not getting babied by judges...
Shinya would hurt Joe. And he'd make a joke out of Kenny.