In Oriental families, sons support the parents, whereas daughters don't. Daughters-in-law join the family, whereas daughters join the in-laws' family. In many cases, the son is expected to live together with the parents. I think the son's having a non-Oriental spouse definitely puts a crimp in that tradition. The other problem is having a grandson carrying the family name who doesn't look like the grandparents.
I'm gonna go out on a limb here, but what the heck. In reference to white females/asian guys, the few instances I've seen confirm that while the females are more educated (based on assumptions of dress, conduct & environment where spotted), they are definitely less physically attractive.
It might be my own personal preferences, but they were washed-out redheads, with not particularly good figures, carriage, etc. In the unfair race for coupling, their college sisters who were equally smart, but better looking, captured all the higher quality white males.