I'm not sure when the concept of "gender identity" got its start but people have confused it with sex. When you fill out a medical form (or many other forms for that matter), you are often asked your sex. This is based on biology. Your chromosomes. It has nothing to do with gender identity (except that most people to identify their gender with their sex). I'm not sure who decided that male/female bathrooms/prisons/sports/etc. should be based on gender identity as opposed to sex but they are all idiots and must think everyone else is as well.