You were not responding to my position, then. It doesn't matter whether or that the NCAA adopted earlier models of creating divisions. What matters is, as you rightfully first stated, that the NCAA divisions are their own business.
And as has been pointed out ad nauseum, it is hormone exposures that inform any need for divisions at all. And because it is hormone exposure that informs the division, it should be hormone exposure that delineates the actual divisions. Not "sex".
Well, just to nitpick, hormone exposure itself is just another imperfect index. Rather, it is the developmental, physiological outcome that ultimately matters. So, just a quick example, hormone exposure to an androgen-insensitive person probably won't matter here. But I do agree, exposure to androgens during adolescence and puberty are probably good indices.
Yup. XY women perform athletically the same as XX women.