Ok, that's fair. But you didn't present is as a "theory" in what you wrote. There's a mountain of research showing the social and cultural contributions to a person's gender, which doesn't preclude a role for biology. Any honest person familiar with the research will say: we simply don't know the balance between biology and society when it comes to a person's gender identity. But even if we could prove beyond a shadow of a doubt that gender identity is biologically determined prior to birth, that wouldn't explain how art, music, theatre, literature, and language can be gendered feminine or masculine, right? Or why gender presentation can have little to do with a person's gender identity or biological sex. Which is why what you wrote is incomplete. Not necessarily wrong. Incomplete. Thus, misleading.