Well to start with Eddie isn't a clown fish. Secondly I thought it was only claimed that he had changed his name and preferred pronoun. If that's the only changes then no fuss.
The proportion of the population with a DSD (Difference in sexual development) is 1.7% but the sex of most of them can be identified correctly. The proportion of the population that cannot be sexed is a somewhat lower 0.018%. I do agree with your final point.