What makes you think that a computer that can generate music cannot also generate a background for the "creator" of that music? It can give you all the stories that touch our hearts even more so than we can imagine.
Why generate a fake story? Why not communicate the real and moving journey of how a single note in the training data travelled through hundreds of neurons and thousands of matrices, and eventually made it past the final activation function to become a feature in the output tensor.
Given two stories, both identical, where one story is real - the real story will always be more meaningful because it has actually happened within the constraints of our reality, granting it validity and us the ability to relate to it.
Now, consider two stories, both identical, where one story is "real" and the other story is from a simulated universe. Now I'd say that both stories are of possibly equivalent value, since both have happened.