Auto-spellcheckers make me a better writer, it's just a fact, I tend to misspell a lot. I don't know how one of the great literature writers would use ChatGPT, otherwise I would be a great literature writer, but I can tell you that lots of writers around 1920-1950 wrote love letters to their typewriters, from André Breton and other surrealists [1] to Isaac Asimov, Gabriel García Márquez, and so on. And plenty of editors thanked Chester Floyd Carlson, inventor of electrophotography, a thousand times while enlarging the hieroglyphs of writers insisting to write with a pen or pencil. These inventions were certainly helpful. So many recent good books would have never been written without a word processor able to run on a cheap laptop. Even espresso machines were probably extremely important in the making of at least one good book.

So, yes, ChatGPT will probably not be essential in the creation of art, even today you could write a great novel with merely $10 for pencil and paper, but it will be better with ChatGPT or similar tools: faster to find the word, easier to iterate over the possibilities of a phrase, helpful to evaluate parallel scenarios, and other use cases to be found by great writers.

Sure, there might be an issue for the artists themselves: who do you reward, is it "valid" art, and so forth. But as a reader, ChatGPT hints that the greatest works of literature are yet to come: hundreds of times while reading a page I would have wanted to read a hundred more pages about a particular aspect but the author went frustratingly in another direction. In this case, the author might be elevated, from the laborer putting words on paper, to a generator of directions to be followed by the generator of text, in the same manner Michelangelo, Caravaggio, or Gaudi directed the painters, sculptors, and workers to execute accordingly.

[1] https://en.wikipedia.org/wiki/Surrealist_automatism