As someone who has taken “courses” in a secular institution (and who just today attended a panel on diversity among university faculty), I think there’s a substantial difference between the Jewish school experience and the college experience.
College deals with adults rather than children. Their identities are more fully formed and independent, and therefore their opinions are less subject to manipulation.
Furthermore, in college, the ideas are pretty easily separated from the purpose of the education. You (almost always) don’t learn geometry to be a triangle, or government history to become a politician or constitutional law to become an abortion provider.
Contrast that with the frum education system, where knowledge and orthodoxy are one and the same with accomplishment, embodiment, and success. Just as an illustration, if you went to college because you wanted to be an economist so that you could design markets to redistribute wealth from the rich to the poor, you would be really, really upset if the top professor in the field for that school spent class talking about how all decent economists believe there should be an active baby market, and organ market, and cocaine market and that restrictions against child labor are depriving families of a rightful source of income for no purpose, and that corporate tax is the greatest injustice since WWII.
Well, frum classes are all like that. The teachers are presented as role models, the goals are embodiment as well as learning information, and viewpoints other than those of the teacher are not tolerated.