Asian is not a race. What makes you think there's shared genetic lineage between someone born in the north of China and someone born in Nepal? Or in the middle of Indonesia or in Afganistan or in Hokkaido.. etc etc. If we are doing to go by diversity than why not go full hog and analyze genetic variance of your employees and add a loss function that maximizes variance.
Neither is black a race. Black people are the most ethincally diverse "race" At some point we are grouping people based on the way we look or the continent we associate them with, in order to have these conversations,