The issue isn't that colleges and universities don't do exactly what's described in the OP. They do, but one must look for it, usually in the classroom. Believe it or not, pretty much all college courses present multiple points of view for the subject matter they cover. Indeed, doing just that is the whole point of introductory and/or survey courses in a given discipline.
The problem is that many individuals who get into such institutions aren't ready to perform the critical thinking that being so exposed demands one be capable of doing.
How could they? Young people often these days seem challenged to express any idea that requires one do so in more than 140 characters. I'm sorry, but the world's weighty issues cannot be effectively considered, expressed and discussed in 140 characters. 140 Characters is a slogan, not an exposition of critical thought. Perhaps we are creating a generation of ad copywriters and other advertising workers?