ChatGPT is an amazing tool for coming up with content ideas, and mapping out or structuring content in terms of related pieces of content that you can interlink.
It also is a great tool for laying out books.
I've cranked out several Kindle books thanks to the outlining and organizing help of ChatGPT.
But with that said, keep in mind that ChatGPT does a lousy job of actually producing the content.
You need something more engaging. You need something that actually delivers on search intent.
But when it comes to organization, brainstorming, interlinking ideas, and even doing content audits using an indirect method, ChatGPT is definitely up to the job.