As much as you’re free to be trapped in the conventional box, one is free to use or redefine languages; one may say, “you guys” among girls; anyone (male, female, neither or non-binary) is free to join some community of “brethren.” Males are welcome to live in a “sister city.”
For better anonymity, it could be actually more convenient as a decoy-shield if the name is misleading. As they say, “To fool your enemies, fool your friends first.” Although, this doesn’t change the fact that your point is valid & many people are often thinking in-the-box, including myself. If you feel someone is too stupid, you can ignore them without wasting your time & energy. Just a thought.