Well to me this kinds makes sense in a evolutionary type of way.
Female sleeps around to get attractive genes from Chads to ensure her offspring will be attractive with higher chances of survival/reproduction due to Thundercock genes but the issue/problem is that since Chads have ready and easy access to quality females they're unlikely to a good provider for her offspring as he doesn't really need the female once she's pregnant and is very likely to move onto another female once he's done plowing the fields.
So said female then goes and find a male who will be a good provider for her and her offspring, but one that she can tie down and ensure her and her offspring will be cared for.
So Chads get lots of sex and no responsibilities and "betas" get all the responsibilities with only sloppy seconds.
Nature is funny and kruel
On a personal note;
its my own experience that women love to fuck the "bad boys" but they almost always try to marry the "nice guys". I myself always was kind of a dick to woman but never suffered for it; finding someone to play hide the pickle was always pretty easy but some of my friends who stuck to the older traditions of "gentlemanly ways" never seemed to see much action until after they hit their 30's and then it was always women looking for long term shit deals. Stereotypes exist for a reason my Daddy used to say...
Just my 2.3 cents