I think it depends on how you use it. If you write a one-line prompt, you'll get a "generic" result. With more guidance, you can get something much more personal. For example, you could imagine a story and let ChatGPT pick the actual words.
At the end, you can put an arbitrary amount of work to get a generated story. You can treat ChatGPT as a co-author who will help you do the parts you want (e.g. find ideas, find text structure, write the actual sentences). The end result depends on how much work you want to do yourself.
This is very achievable by layering it. Start by asking for a synopsis, then characters, then story arc, then outline, then chapters, then chapter outlines, then content. Each time seeding the prompt with the hierarchy of content above that level.
I think it depends on how you use it. If you write a one-line prompt, you'll get a "generic" result. With more guidance, you can get something much more personal. For example, you could imagine a story and let ChatGPT pick the actual words.
At the end, you can put an arbitrary amount of work to get a generated story. You can treat ChatGPT as a co-author who will help you do the parts you want (e.g. find ideas, find text structure, write the actual sentences). The end result depends on how much work you want to do yourself.