the people making art in those caves were basically modern humans. evolution happens over a very long timespan and homo sapiens has not been around for that long. even the other human species at that time would have been, within some margin, as smart as modern humans. to find a human ancestor that was only capable of the level of creativity ai bros show you would have to go back to before the appearance of homo sapiens (our species, btw) and likely several species before that. this means they dont even show so much as the bare minimum of creativity a human should be capable of.