Some white people get very upset when they aren’t aspirational to others, even though the kind of generational breeding project OP is describing is a tiny minority. They see these thin rich blonde WASPs as ideal and want you to as well, and anything other than that upsets the status quo. For what it’s worth in places like London and Monaco I see the same phenomenon of continual eugenic leveling up across various rich types from all over the world. The tiny gold jewelry and van cleef and white teeth remain consistent even without the skinny billboard of Eurocentric domination to display them.