There are historical ideologies that seem to repeatedly be wrong for essentially the same reasons.

• Mind-body dualism.
• Essentialist "scientific" theories to explain then existing social norms.

Which is more powerful in this case? Hopefully we can find out.

As for gender identity dysphoria, I don't doubt there is a phenomena out there. But for it to support your position seems to require that the DSM-IV cut the world at its joints. I think we agree that this is a laughable assertion.

In particular, I distrust the current descriptions because I suspect that the distinction between gender and sex is not being sufficiently respected by those making the diagnostic definitions. Lots of mental illness is defined explicitly or implicitly in terms of fit into current social norms.