That depends on whether one accepts theoretical psychology as science rather than a ‘fuzzy subject’.  I do not.  I've read too many psychology papers where the author(s) cherry-picked and/or made up 'data' to conform to their own prejudices.  Anyone who doubts this need only read ‘The Bell Curve’. Admittedly applied psychology is another matter, as it has a stronger basis in science and consistently reproducible results.

Biological reality is that, again, with few exceptions a vertebrate with a ‘y’ chromosome is male. Hermaphrodites are aberrations (representing 0.1-0.2% of the population). And I suspect you may not see as much change in future laws as you might hope for. 200 years ago US social, political, economic, legal and educational institutions were inherently white supremacist. They still are.