You don't need to train on pictures of canine golfers to make highly convincing pictures of dogs driving golf carts on Mars. https://imgur.com/a/EIWUJYp The AIs are extremely good at mixing concepts.

I don't think that's necessarily true.

An AI can generate an image of a wizard with a frog on their head and that doesn't imply that the training set had such an image

Are you sure? I’d guess that AI can extrapolate from adult porn and non-sexual depictions of children.