> Neither can create something that isn't in some way part of their data set.

Thank you for providing a clear example of what I term "selling humanity short"

None of human art exists outside the extremely complex cultural evolution history where bits and pieces of perceived reality are internalized by individuals (using entirely novel and evolving mental models and representations that we hardly understand) and is then communicated, gets transplanted and recognized as similar experiences in the brains of other humans, in an ever evolving chain of brain to brain interactions via (much more mundane) physical channels.

To make all this extraordinary stuff fit the current AI narrative people opt to wield a dehumanizing sledgehammer to eliminate anything but the in / out information processing concept (ignoring the garbage-in / garbage-out problem).

But just to play along for the sake of the argument, for AI to create "art", it would have to ingest a body of boring mystery whodunit prose and decide to write a poem about it.