What is most galling about this is that even if we assume that culture X yields candidates with personality characteristics undervalued by culture Y, _racial background doesn't indicate culture_. How should a second-generation Taiwanese American raised predominantly in American culture answer the race question on their application?
This. I remember an anecdote by Ota Ulč, a Czech writer who escaped communism to emigrate into the USA.
When asked to select his race, Ota didn't realize "Caucasian" applied to him – after all he's Czech, not from Caucasus! So he checked "Other" instead. An honest mistake.