Hi Angelique,
Thanks for chiming in.
I’m a bit surprised that you say “it isn’t science.” Likewise, I’m surprised you ask all these seemingly rhetorical questions. Take a look at these:
https://www.scientificamerican.com/article/the-new-science-of-sex-and-gender
https://www.nationalgeographic.com/magazine/2017/01/how-science-helps-us-understand-gender-identity/