So, you think all those ancient cave drawings are a hoax?
Where?
The truth is that ancient humans were much more likely to report, and believe reports, about unicorns, headless people with faces in their chests, giants, dragons, etc, etc. There were no popular reports of UFO sightings or diminutive almond eyed aliens.
But people can convince themselves of all sorts of idiotic things. Look at the market in “dinosaur stones” in South America, once they discovered that there was a market for such among idiots.