Um…well, to be honest, as soon as you use a story to broadcast an opinion, whatever that opinion might be, you kind of lose the ability to then say “Don’t judge my opinions! The story was just supposed to be hot!”
And that said, I don’t think there really are stories that contain “nothing else”. Every story comes from a culture, and from a way of perceiving the world that might be skewed. If you think it’s hot to kill people, and then write a story with snuff, and someone is offended by you writing a story where killing another person is glorified, it could very well be that you wrote the story “because it’s hot” but that doesn’t mean the underlying morals can’t be called into question.