If only it were so simple. Young men are controlled by their excess testosterone. While there are willing women who will put up with their lack of commitment and demands for casual sex, they have no reason to consider “settling down”.
After a certain age, single women start discovering that all the good guys are taken. That is, the lesser maintenance ladies have made their move.
It is truly a difficult dynamic. I don’t think that there any easy, one-size-fits-all solutions to how best handle any given situation.