The fact that you mention “Hollywoodified” is also important–because of their high production values, most films are even more shackled by commercial demands than books are (though both mediums are, to some extent). If you think it’s a question of art versus marketability, which it often is. I don’t think there’s anything inherently “dumb” about movies or “smart” about books–the issue is more that in any art form, good, challenging work is often ignored by people who don’t want to be challenged. Literature/literary fiction has the benefit of having been canonized and sheltered by a crew of academics for significantly longer than film has.