I have a PhD in biology. You are wrong: the idea that human sex isn't essentially binary (with the usual rare edge cases of biology) is something that has been pushed by non-scientists with an ideological axe to grind; the essentially binary nature of human (and mammalian) sex is not something that mainstream researchers question in any significant numbers.
When actual scientists speak out, they get downvoted by the delusional who refuse to accept reality. Thank you for speaking up, and keep at it please. We live in a clown world today that is hanging on to the last remaining strands of sanity.
