It strengthens beliefs on the other side with independent minds. It also makes leftism The Man. I see this already with Gen Z kids, some of whom mock this stuff mercilessly. Being Woke is "square," while being anti-Woke is being rebellious.
Ultimately, it's the other profs and spineless administrators who know something is wrong but say nothing who are to blame. I certainly understand why 20 year-old kids are unwilling to jeopardize their diplomas by speaking up in this environment, but I admire the students who still do. Ultimately, you have to answer the man above and the guy in the mirror.