Movies are kind of biased, you know? We're pretty much told from the get-go who the hero is and who the supervillain -- and those roles are reinforced throughout the movie until the conclusion.
And that doesn't seem fair. Because, like, what if the bad guy is actually more of an "all right guy" who's in a pickle or something? Maybe nobody just gets him, you know? Well, we're here to do justice to those "evil doers" that people just probably don't understand.