Information that is useful to have can also be useful to keep hidden and undisclosed. Just saying.My original point was that sex identity is useful information to have. Male and female are definitive terms for that. Isn't it therefore obscuring the usefulness of those terms by allowing people with a penis to call themselves female and people with a vagina to call themselves male, or for people to proclaim they are neither male or female? It just creates more confusion where there needn't be any.
For example, what if people with brown hair wanted to identify as blondes? What if people with blonde hair wanted to identify as brunettes? The words blonde and brunettes become meaningless, because there would be no concrete definitions of those words, they just feel that they are blondes and brunettes, it's subjective you might say.
Why would I care if someone identified with their hair color?