I’m not sure. The bestsellers lists are full of average-or-slightly-above-average wordsmiths with a good idea, the time and stamina to write a novel and risk it failing, someone who was willing to take a chance on them, and a bit of luck. The majority of human creative output is not exceptional.

A decent LLM can just keep going. Time and stamina are effectively unlimited, and an LLM can just keep rolling its 100 dice until they all come up sixes.

Or an author can just input their ideas and have an LLM do the boring bit of actually putting the words on the paper.