If you like the idea but are disappointed by the blatant errors in this vibe-coded website, there was a video game saga called Real Lives which was basically the same idea, except only for contemporary people (but you would still draw an area of the world, etc. from realistic probability distributions), and it was done right. You could make some life decisions (it wasn't purely contemplative) but much of the time you would die as a child of things we don't even know in the first world, like schistosomiasis, and not even be old enough to make any decision. Or you would make one or two, but due to being in an unfavorable environment without opportunities none of the options would improve your life much. Very sobering.

I remember playing Real Lives 2004 (or maybe 2007) and 2010, both good. I think there are later versions but I had heard they had changed philosophy somehow and some people weren't satisfied (they said they went overboard with educational elements on top of the raw life simulation), so I can't vouch for those.

I don't know if 2010 would be easy to play in today's computers. Now I'm curious, I might try for old times' sake.

A version with the whole history of humanity, like what htis website aims to be but fails, would be amazing if it existed.