Most of the White Men in WMAF relationships are the runts of the litter. They are the rejects of White society. They are the betas or the omega degenerates. It's very evident. Just look around. How can they pass on superior traits when they are deeply inferior? That's the primary reason why they have to resort to dating self-hating Asian females. Very few superior Alpha White men will settle for Asian women when they can have a knockout Caucasian or Latina model as a wife, a statuesque female with banging curves.
Asian Males who date XFs have to go out of their comfort zone and combat societal barriers and stereotypes, they are typically the AMOGs of the group. So obviously Alpha will Alpha in the end, and pass on their superior traits.