I am not sure that it really did that.
My own personal theory is that foids have sex with the male's status, not directly to his body. Of course, Chad's physique is what a top status dominant male would have looked like in the wild, and foids remember that in their genes.
However, even today, we have examples of foids wanting to have sex with males who are not Chads, like serial killers. The reason is that the serial killer is a celebrity and celebrity is a status by itself, even if it is for infamous reasons.
Also, in the past, there were many examples of men who were attractive to women because of an inherited title (of nobility, for example), regardless of their physical attributes.
It seems to me that Chads have become again the top choice for women today (like in the paleolithic) because the media industry has made handsomeness an obsession. In the 50s, I don't think women were attracted to Chad as much as today. Other forms of status still mattered (like wearing a uniform or money, social standing, etc). However, they still found male handsomeness appealing (for genetic reasons) and that is why the visual media put Chads everywhere, from News anchors to Soap operas because they noticed it had a positive impact on audience numbers. Then the Media expanded tremendously and everyone became used to be bombarded by Chad images 24/7. That made the Chad physique a status by itself, in addition to its baseline genetic attractiveness.
What I mean is that Chad's attractiveness today is not due to genetic factors only but is artificially enhanced to the point of becoming the top status.
Other cultures never did that and I think it is possible to again give status to non Chads, but that would require a big change in culture.