Driver's license and passport record sex, and bathrooms and other spaces that are separated for women and men are done so on the basis of sex.
Being an objective measurement of material biological state, sex isn't the same type of thing as a gender identity belief, which is indeed self-declared like a religion is.
Being an objective measurement of material biological state, sex isn't the same type of thing as a gender identity belief, which is indeed self-declared like a religion is.