My question is would a human author be any different?
Humans don’t remember the exact source material, it gets abstracted into concepts before being saved as an engram. This is how we’re able to create new works of art while AI is only able to do photoshop on its training data. Humans will forget the text but remember the soul, AI only has access to the exact work and cannot replicate the soul of a work (at least with its current implementation, if these systems were made to be anything more than glorified IP theft we could see systems that could actually do art like humans, but we don’t live in that world)