I don’t think that’s so obvious and I would also caution people to not go on witch-hunts on what can clearly be a grey area. Artists assembling images out of various sources is not uncommon and due to the abundance of AI generated images these days they might not even have been aware.
It is IMHO also false to call AI generating images stealing, its a bit more complex than that. But I fully understand and respect if someone doesn’t want to use AI generated imagery over ethical concerns.