I think that a lot of the benefit might be having a defined plan for approaching a job search. E.g. what specific topics do you cover and what topics don't you cover? For a given topic, how in depth do you go and what aspects do you cover? Etc.

I could see using AI to research a given topic or walk you through a given problem. However, at this point I don't think AI is up to packaging up a well rounded textbook level study on a topic.