Art mediates human values and broadcasts judgments about the good life, how to live, what is worthy, what is looked up to or down on. Yes, even uptown funk does that, it communicates a lifestyle ideal, whether the audience thinks about it in those terms or not.

In AI media (when not curated and iterated with close human input) whose values am I getting. Who is communicating their values to me? Bruno Mars dancing this way, wearing this, acting this way etc is cool because it is Bruno Mars and he's cool and he's cool because he has been cool and all your friends know. So by watching him you get enculturated into this culture. If you watch AI, and learn how you act from those, you will likely look like a fool.

Similarly with stories. The morale may be entirely opposite to what a human would say. And even if a human builds a story on some morale you find reprehensible, it's still likely from their own life experience, and by trying to understand, you grow empathy and can better understand what life trajectories exist. Bu and AI text pushing some morale has no real life it reaches back into, to express their view of the human condition. There is no gain from reading it.