No, Him being a millionaire makes it less surprising that he does something about it. If you can do something about it, why wouldn't you?
If it was someone making a funny joke I am sure he would, but it isn't. It's one or more losers who dissect every word he says and splices them together to try to make him look bad (which you can do with anyone). Maybe instead of Rogan putting up with it like you suggest those people can find something useful to do with their time instead of following a celebrity like a crazy ex girlfriend.
People can listen to his podcast within context and make their own conclusions instead of edited nonsense from obvious haters. If talking about the male physique makes you gay then all of Sherdog is gay.