All fiction, if it's successful, is going to appeal to the emotions. Emotion is really what fiction is all about. That's not to say fiction can't be thoughtful, or present some interesting or provocative ideas to make us think. But if you want to present an intellectual argument, nonfiction is a better tool. You can drive a nail with a shoe but a hammer is a better tool for that. But fiction is about emotional resonance, about making us feel things on a primal and visceral level.