Even if this wasn't vibe coded it would be impossible to fact check billions of possible lives. I think thought provoking toys like this are a great use of AI, assuming no one takes them seriously.
you can't fact check real individual lives but you can draw up a probabilistic representation
that is if your probabilities are actually correct, that the anthropological or archaeological or sociological field for that specific region and demographic is robust (and there is good primary evidence for supporting the claims), and you're not some vibe-coded AI tool that spits out a convincing lie constructed on not even educated guesses, casting shadows on the wall of the Platonic cave where the people who trust slop uncritically are chained to their ignorance for perpetuity
I am not sure why it is thought-provoking for a website to lie to you? There is plenty of real history and demography to read about.