You keep using sex and gender interchangeably, but in humans they are absolutely not. Gender is the “performative” stuff, the expression of gender as influenced by society. People relate to masculinity, femininity, either, or neither differently.
You need an education, dude, and you absolutely cannot rely on marginalized people to do the explaining for you. It’s not fair nor is it right. By constantly debating sex/gender/science/and bringing up stuff related to a community you have no experience with, you keep placing the burden on those whose reality this is, and the emotional labor required to respond to them just depletes the energy to keep fighting.
How do you benefit? Want to know more? Samy linked so many articles. It would behoove you to click a link and read one.