That should not offend you so much. Different job positions require a certain build. Women are built flexible and men are built strong(As far as muscular biology goes). So someone with a masculine build could be preferred. and often all-girl schools/places are for women to interact and connect. Like a feminist support group. It makes them feel independent with no need for a man and they learn to work for themselves and rely on their friends rather than conforming to men. It is also because a majority of people are cis and straight. Having a primarily one biological sex school cuts down on sexual misconduct and there is less fear of sexual assault.
You should not be offended but instead, impressed. It is impressive that based simply on outer biological sex we can cut down on misconduct and make work more efficient. It is even more impressive that women can learn to be free of a man in this environment. Don't simply look at the negative, Also look at the positive. Not everything that doesn't cater to your identity is bad or offensive. Some of it is simply following the majority to benefit the nation. Be happy for the women in that environment, not upset for the people who aren't (=
