My post wasn't based on my opinion. It is based on the fact that literary theories are extremely political in the methods many prescribe for interpreting texts (e.g., deconstruction, feminist literary criticism, anything to do with Lacan, the list is endless) and if you've ever actually taken a university level literature course beyond the introductory requirements, you'd know this. So despite how "silly" you may find it, it is a fact.
My point was that, if you are already predisposed to disagree with the basic assumptions upon which those types of theories rest, and which the instructor is most likely sympathetic to (otherwise they wouldn't be teaching it), then you're not going to have a very high opinion of the subject matter. And many of those theories rest on assumptions that people here would probably label as "extremely liberal/socialist/Marxist (literally)/communist." Personally, having studied rhetoric, I am sick of that type of theory. Luckily, my field has other branches that are often unrelated to that stuff, so I'm not stuck with it like I would be if I studied English proper.
But literary interpretation is basically all about applying new, politically inspired theories to old texts.