I don't know... what you're talking about is something like how Netflix used their data to motivate shows like House of Cards and Orange is the New Black, which they "knew" in some sense would have mass appeal. The masses are easy to please because you can just average over their individual tastes and capture huge swaths of the general population (see also: political parties, popular music, "middle-brow" chain restaurants), but it's much more difficult to get an accurate prediction for a single person. If you zoom in close enough, everyone becomes an outlier.

Also, creating art is not as simple as entering the infinite realm of possible songs (or paintings, or meals or...) and just choosing a set of parameters. Again, a broad set of parameters, sure. I'm going to write a rock song. I'm going to cook a boeuf bourguignon. But how to capture the weird unsystematic idiosyncrasies of any given individual, and do so in a way that doesn't feel soulless and artificial?