Snarf mentioned that if everyone got it, it wouldn't be a good satire. That might be part of it, but I think also a lot of people saw it when they were 11 on TBS and missed the satire because of that. I agree, it's pretty blatant. At the same time, it is earnest and there's no actual comedy. So it is satire in the way that Animal Farm is -- one where there isn't any abject humor, you just proverbially point to the thing and say, 'ah, that's a stand-in for ______, neat.' I guess that's pretty on-brand for satire, but what we see a lot more of in movies are parodies. So perhaps it is simply that people weren't expecting a non-parody satire in a movie, whereas they would in a book.