The opposite result (predicting sex but not gender) would also be interesting but less so
I disagree. It could be wildly interesting if somebody born a male got a scan and it revealed a female brain. Dunno if “anti-trans” people would agree then that a sex-change is valid or if they’d disagree and start finding other excuses.
I do mean person born a male that wants to become female. Anti-trans people often make points that trans people are just forced into being trans by the trans-mafia (or whatever term they use) aka social pressure. A brain scan indicating a female brain would counter that. But as I said, they’d probably find other excuses “it’s a mental disease that can be treated” and so on and so forth.
That would embolden the anti-trans crowd.
Science is ongoing though, so who knows what the results will be.