The advancement and flourishing of the human species. But that's beside the point. What rbanffy suggests might be absurd, but not because it somehow violates the laws of biology.

I don’t see any point in human history where what is being described matches any stable human behavior. So while not impossible, it is probably unlikely eh?

And think of what that would actually mean, and if you’d even want it - you’d be as likely to match up with a random Chinese 60 year old, or a 13 year old African tribe member, or 30 something European (while being one of those other two) or whatever.

I can’t think of any sane person that would be willing to mate with someone truly randomly. And if it wasn’t truly random, who gets to decide on the criteria? Because that is exactly where the moral hazard comes in.

> you’d be as likely to match up with a random Chinese 60 year old, or a 13 year old African tribe member, or 30 something European

Any such system would probably match people within the same generation. At a future point humans may be far more ethnically homogeneous. Or reproduction may be separated from romance - you donate to the seed bank but sex is a sterile act. There's lots of possibilities. I admit most look unlikely; but like, if that's what it takes to thrive at a galactic level, then it's simply unlikely we never reach that level. But let's not pretend that this is some sort of fundamental biological impossibility.