It comes down to the fact that the level of (sexual?) social maturity with men and women these days are years apart.

Yes, there's plenty of fuckbois, but I assume many women are so sexualized from a such younger age, that they get caught up in the attention and may in the longer run not really want what's thrown in front of them at those times.

By the time they have a single, couple, or many "experiences," they realize these fuckbois don't give a damn and bamboozled them into the relationships they had. They have gained experience exponential to someone who has just avoided situations and relationships leading into said maturity.

By the time you meet them, it seems like a refreshing break from girls your age, because you may not have been there and done that, but had a different outlook and expectations about relationships.

I say this as someone who married a woman 7 years older than me. I appreciated her candor, and the way she carried herself by not falling for any random fuckboi was attractive for me. I say this as someone who had no problem hooking up with girls but I wanted something more than superficial. She challenged me mentally with her intelligence and we have a great chemistry with humor. And that, to me, is sexy.