Thanks for reading and replying! By author I mean "that which writes books on bestseller lists" as opposed to "that which outputs text". Hope that clarifies.
If your basic point is that people underestimate the potential for creativity by future AIs / programs / whatever we call them, I think you're right that this underestimation is still happening, even though we have had creative tools for many years doing way more than, as Picasso put it, only giving answers.