True Left

"Some men probably did inherit it, but then consequently tended to reproduce less than the other men who did not inherit it. In order for a trait to become established, not only does it have to be inherited, but it has to be inherited by those who then reproduced more than (or at least not less than) average."
But by the same token, how did gracility for women become established? Since the female offspring also have the potential of patrilineally inheriting their skeletal type, wouldn't there have been a sizeable proportion of robust women as well? And wouldn't these women have reproduced as much as the gracile women, since gracility does not afford any ergonomic advantages after the women have been transported back to the steppe?

"This is how we eventually reach the pentagon shape."
I see. So what we end up getting is a gracialized Turanian face?

"I of course am totally disgusted by this, since I think gracile women should only be paired with similarly gracile men"
So what we have is Aryans being cuckolded by Tuanian "Chads"... Perhaps some Aryans today sense this and end up turning to inceldom because of this?

"So what we have is Aryans being cuckolded by Tuanian "Chads"... Perhaps some Aryans today sense this and end up turning to inceldom because of this?"

I disagree with your description. Incels constantly wish they looked like Chads and are frustrated that they do not, whereas I have never for an instant wished to look like anyone robust. When a robust man expresses preference for gracile women, the first thought in my mind is: "Please look in the mirror and figure out you do not deserve anyone so much more highly evolved than yourself, you subhuman!" This is the opposite of incel-style thinking.

If anything, incels should be compared to the steppe losers:

https://trueleft.createaforum.com/human-evolution/facial-aryanism/msg19047/#msg19047

Some men probably did inherit it, but then consequently tended to reproduce less than the other men who did not inherit it.

who wished they were the steppe winners but were not.

https://twitter.com/LindyTasteful/status/1722638774155252162 (video at link)