Content creating AIs are not new to me. I've already encountered them a lot of times while searching how to make a quality post fast.
As you already have mentioned and from what I understand, the content generated by the AI still needs to be polished. And the polisher must also understand the subject so that he/she can edit and correct the generated content.
With this in mind, it makes me question an author if the way they answer a question is different on how they would make their content - There is a possibility that their content is AI generated. Also, there are some posts that don't make sense as a whole - a possible AI generated. 😁
Also, we can use the assistance of an AI to help us detect and "punish" non-beneficial content that are created by AI. 😊