Fantasy and Science Fiction literature are actually interesting and imaginative, and stir the dreamer in us. Other fiction, and much nonfiction, is just plain boring or stupefying (characters do some pretty stupid things in other fiction.....more often than in fantasy/sci-fi......). I don't want to read about someone making a stupid mistake and having rather uninteresting misadventures (or an untimely demise) because of it. At least on the occasions where characters make stupid mistakes in fantasy/sci-fi, the resulting misadventures or consequences are typically more interesting and imaginative, right? Other fiction is generally mundane and deals with things we already see/hear/do on a regular basis in real life, so it's not really interesting. To me anyway, YMMV.
Then again, for similar reasons, I don't bother watching the news very often because I have no desire to see/hear/read about real people and their stupid mistakes, horrible parenting, random idiocy, psychotic urges, and whatnot.