Take a look around, I think you'll find transmen comprise a much larger proportion of this community (and tech communities in general) than the general population.
There's also a lot of desire on HN to comment on political topics while pretending not to comment on political topics. Things like gender identity, women in tech, genetic differences, etc are all wonderful smokescreens to allow us to post politically but maintain a solid veneer of simply having an intellectual discussion on a topic of general interest.