What you're misunderstanding, is the problem that I presented to the OP. As I've understood it, a Trans person is very firm on their gender identity. If they were born a biological male, but now identify as a female, they insist that they're a 100% female, not some bogus wannabe. They're fighting for their identity to be validated. Then there are the postmodernists that claim that gender is an arbitrary social construct - not real, just used as a tool of oppression. These people would tell a trans person that their gender identity is invalid, because all gender identities are invalid. Does this make sense? It's a messy confrontation between the two ways of thinking.