He wasn't objecting to that. He was saying the "point" is about as sophisticated as "we should just, like, all agree not to fight wars man".

Personally I don't mind it. I think it would be difficult to convey well thought out points in art (the world is too complicated) and it's fine that they're just fun visual wordplays.

You wouldn't criticise a newspaper political cartoon for taking liberties with reality; these are basically the same.