The reality is most people are not spending tens of thousands of dollars and 4-5 years (or more) of their life to learn about Comparitive religions, Philosophy , evolution , Freud , gender studies or other disciples that might be objective.
Almost everyone (And not just frum jews) are going to college to get a better job. You might have heard about the guy who caught a home run by Derek Jeter, he had $100,000 in College debt. One does not amass that kind of debt unless you think it will pay off.
Yeah I took an Anthropology course that the professor once brought in someone with questionable ideas and I took a yiddish literature course taught be a recontructionist rabbi (Almost everyone in the class was frum) It met some college requirement.
But those were the exception and for most people those classes are the exception as well