Are you conflating (a) true chromosomal/development issues such that the person does not have a clear biological sex, with (b) people who are clearly one biological sex, but have a mental perception that they should be a different biological sex?
Are you conflating (a) true chromosomal/development issues such that the person does not have a clear biological sex, with (b) people who are clearly one biological sex, but have a mental perception that they should be a different biological sex?