I actually strongly disagree with this kind of sociological determinism.
Yes, I have noticed that people of inferior physiognomy tend to be over-represented in such tragedy, but it is by no means all. I think people who live on the internet too much have not really analyzed this problem in real life.
Many people mix-race as a result of their economic situation, for reasons of class and broken community relations. Lower-class women can have very good genes but cannot get a man due to being abandoned by their Father's and indeed by the State, which has cut them off worthy opportunities they would prefer in any other circumstances. ( And that's when the Mulattos and Pajeets swoop in, because they know that unloved, unprotected women, often cast off or ignored, are the result of White men being sociologically CAGED, over-worked, and artificially humiliated by the system over the course of their marriages. Among many other reasons, which cause that Father-Daughter relationship to break down. )
The fact that Rightists are quite unloving to their daughters or girlfriends, I think itself should tell us something BAD, about the current state of Whites generally.
We observe this same phenomena with Lazy "white males" who shack with Asian females, because the Asian has lower standards, and will tolerate much bullshit, just to get a White man.