Having played with ChatGPT as a writer, I agree. It takes some learning to shape prompts. It might eventually be good for churning out first-draft-level writing more rapidly by fleshing out those sections where you usually head off to a search engine or just want to add some ‘scaffolding’ such as a location description you know won’t make it to the final book, but which lets you more clearly imagine the space.

It’s incredibly limited though, once you start to really get familiar with it!