Voting with feet can work in several ways. Some young people have bought into gender ideology and may use that as a way to rule university courses out or in.
However, if management of a university push, or allow their 'diversity and equality' teams to push, an approach that puts student feelings first and academic rigour, freedom of thought and freedom of expression a long way behind, they can expect to start losing top academics and potential Ph.D. students.
The slogan seen at Sussex 'We're not paying £9750 to be taught by a transphobe!' or whatever it was sums it all up. Some students see themselves as consumers. They are buying their qualifications and the university experience, just as, in many cases, their parents bought their school level qualifications by paying for fees and/or tutors and/or a house in the catchment of a good school. They feel entitled to dictate how that university experience will play out. They won't have their views challenged, because the customer is always right. They will get good marks because they've paid for them. If the work is sub-standard that must be the fault of poor teaching, so they should get the good marks anyway.
When I worked in a university a decade or so ago, it was an eye opener to see how much weight the senior admin put on student feedback. It was very much a case of a mouthy student saying 'Jump!' and the faculty admin saying 'How high?'