Someone tell him that archaeologists actually have shit accuracy at identifying biological sex and most other traits about the person from when they were alive.
Seeing how they get things wrong about entire civilizations all the damn time, I don't think I'd give a shit about what they think my or anyone else's genders were.
I mean, all "there are two genders" arguments are stupid, but somehow this was the stupidest I've come across.
Also, if future archaeologists are anything like the current/past ones. You know, stealing sacred religious items from Indigenous communities following the genocide of said communities (and then getting all self-rightous and claiming finders keepers when the survivors from those Indigenous communities ask for their stuff back), grinding up and eating mummies, selling human remains and ancient funerary items at auctions to the ultra rich, two out of three are definitely still happening by the way, inconclusive on the middle one. Yeah I'd rather rot and leave no trace for them.