Because society is brainwashed to think it is necessary.
And to fight this, donate to Foundation for Individual Rights in Education or FIRE. They’ve fought and won cases from speech codes on campus that say you can only hand out fliers on 1% of campus to Title 9 redefinition to say you don’t get legal representation or right to know the charges and cross-examine someone when charged with rape by a university board - who top it off by denying options to present evidence in your defense, give victims the right to appeal if someone is found innocent, and have had investigations of sex women said was consensual but others reported.
See my tagline. Use their tactics against them.