I mentally flip a table every time I hear someone colloquially say "sex is a social construct" (they mean gender) or get hesitant about describing the sex of their gestating baby because they want to leave it ambiguous or on the flip side want to have a "gender reveal" party. People care about the sex of your baby, not their gender. And it's totally fair to study the effects of biological lineage on modern humans instead of treating all humans as the same biological profile or reducing the question to tribally relevant characteristics like skin color (race is a social construct, but biological lineage is not).
Consequently this is why the zeitgeist is so weird. Everything is about e.g. racial identity but race is a social construct that by definition you can't apply based on biological attributes (just like gender) so... ... ??? ...