Look. This is getting cringy since you keep throwing the word "science" around. I'm a researcher in a genetics/neurobiology lab and I can't watch this any more. Twitter is like the worst possible format for an ad hoc biology/genetics lecture but let's have a go.
First: you know how in physics the bohr model of the atom is put in kids textbooks and later when you get to college they tell you that actually that was a simplified lie for children. Biology is kinda similar with the XY chromosome thing. Reality is way more complex.
There are people who are XY who were born with vaginas, who identify as women and who go through their lives living fairly normal female lives and only find out they have a Y chromosome when they have trouble conceiving.