Which is exactly my point. If transwoman A is expressing an opinion, even forcibly, that TW are male, it is outrageous that the law would punish them, just because transwoman B has a different view.
We don't do this with other minority groups, expressing opinions about their own minority. If a Chinese person says "You're not really Chinese if you were born outside of China" or a gay man says, "You're not really gay if you have ever had sex with a woman", they don't get banged up for racism/homophobia.