I'm far, faaar from a wrestling expert, but as I understand its quite literally dangerous for everyone involved for him to wrestle with real men. There's a lotta mutual support that goes into lifting and moving a partner to perform any sort of involved move. Jims too fucking fat for the average male to lift on their own, and is far too weak and fat to appreciably aid in supporting that weight. Similarly, Jims too weak to really lift a male. This limits the moves he can do with anyone massively, to the point where you would struggle to choreograph any enjoyable fight. Perhaps someone more knowledgeable could correct me.
With women, they're usually light enough that he's not gonna have a problem manhandling them. Instead, his problem is doing it fucking dangerously like that slam. It also still forces the woman to work around his extremes of excess.