Using chatbots tells a lot about author's abilities. It is OK to use chatbots to adapt your book to some 9yo students, it is OK to generate images for a computer game to be permitted publishing it in someone's software market, it is OK to use advanced spell checking.

But it is not OK to make your tool thinking instead of you. If chatbot can generate the book for you about some random topic that means the book is already existing. What a sucker your reader should be if he chooses to read a byproduct handbook written by the entity who does not have an ability to learn at all.