>The risk to the father is that he has children with someone who will change and treat him like dirt, leaving him to choose between staying there for his child and being miserable, vs leaving and being financially ruined and potentially unable to move on.

Yes, there are plenty of risks for men, too.

>But it's wild to me to suggest that one in five humans who are male deserve to be Forever Alone.

I did not intend to imply anything about “deserve”. Nature doesn’t really factor in deserving or not deserving. Things just “are”.

>Obviously the "bottom 20%" of women by whatever measure you think determines "worth" should be with their "bottom 20%" male counterparts.

This is going to run contrary to one of the basic tenets of modern society - individual freedom. But again, nature doesn’t care about those ideals.