This would be such a godsend when I was in school. When there was no "click" with me and the teacher, I just zoned out and flunked the class. A teacher that is custom made is really a game changer.
The true insight and guidance that a good mentor can provide, based on the specific needs of the student, is already rare in academia but still possible - everyone remembers that brilliant teacher that made you love a subject, by explaining it with insights you could never have imagined. This will be missing in AI teachers (though it opens a career for online mentors who monitor students' learning and supplement it in areas where it's lacking).
It will be hard to impossible to build career as a teacher with all that free content as a competitor, unless you're an extremely talented teacher who can sell your services to the wealthy.
The great thing about a chatbot style LLM is that it can answer questions the student has about the lessons or assigned content. That's most of what a tutor is there for. It won't be as good at making modifications to the curriculum but you could work around that with some smart design e.g. evaluate the students response, if it's not great then expand on the lesson and ask more questions about the content to find out which parts the student doesn't understand then expand on those or provide additional resources as assignments, test and repeat.
What you describe is the "learning equivalent to personalized ads" that I was talking about as the only option available to poor people.
I wasn't saying the AI tutor would recommend articles by the way. If you were creating a learning platform you would have some custom produced videos and text lessons that you could use. There are also plenty of free or open source materials that could be used like open courses or public domain books. I don't know why you're stuck on "personalized ads".