Joe isn't some enigma. He didnt want to lose his listener base. He has an easy job of gym, then talking about shit. That's all he does and makes millions. If no one tunes in, he won't make anymore money.
His base is what 90% MAGA? Maybe some non-maga will listen to select scientists or interesting humans he has on. Otherwise...its all MAGA.
He can't go against that or his loses his meal ticket. Comedy isn't his strong suit anymore, organizing comedy clubs is a skill set he has. No way he goes against the grain.
Joe will go where his base goes. If they start to turn on Trump. He will turn.