The fact a lot of people are doing it doesn't mean that it's not gender discrimination, and doesn't mean that it's legal. It only means that nobody has complained about it before.
You mean we can't discriminate between pronouns?
Jim's Rules of Carry: 1. Any gun is better than no gun. 2. A gun that is reliable is better than a gun that is not. 3. A hole in the right place is better than a hole in the wrong place. 4. A bigger hole is a better hole.
no guns = might makes right