I'm assuming they've got a marketing deal that requires a specified gender so they get more cash for ads. As a free service... I'm in two minds about it being mandatory for cash purposes; but the options being such that exclude a group of users is quite pants. DA hasn't been all that DA friendly for a while now, it's "Times Magazine" Deviant, not "Outside of Established Norms" Deviant.
Let us know where we can find your art when you've got a new place.