Well — no. Those people have a shared biological lineage, with only a relatively short period of differentiation — while they have radically different cultures

Well — no. Those people have a shared biological lineage, with only a relatively short period of differentiation — while they have radically different cultures. What you’re describing is “black” being useless as a social construct (ie, I know nothing about their culture) but useful medically/scientifically (ie, there’s groupings of medical conditions correlated with that lineage). I would go so far as to say only racists use “black” as a social construct — and project that the medical groupings are the same.