Okay...so we as a species (and frankly all animals) evolve to operate with heuristics to organize the world around us. It helps us streamline our thinking so the dangers of the environment are easily identified, we know who to herd to, who to avoid, and also expend less energy. T

The 'binary' world is not an archaic system designed to keep people down as it is fairly consistent with sex identification we've always evolved to expect. Yes there are bona-fide trans-sexuals, fluid identifiers, who don't feel they fit structural gender norms. But the majority percentage identify as one or the other and it is just easier to operate day to day with binary pronouns and sex identity. Is it discrimination? I don't think so. Could we go further to accept people in the 'grey' area of gender identification? You bet! But stripping the majority of a very common identifier "man or woman" is making life more difficult for everyone.