I think that has more to do with spending all their time obsessively competing against other geniuses that were much more popular (see: Michaelangelo/Raphael, Tesla/Edison).
If a socially awkward genius back in the day just wanted to get laid, they probably had systems in place to do it easily (for men) whether that was brothels or arranged marriages.
Leonardo rarely even finished his projects as he was probably always busy getting man-booty, which wasn't as easy as it is today.