Unfortunately, I really do think that's part of the problem.

AI generates bullshit. School writing assignments are "bullshit" in the sense that nobody wants to read the result. The goal is not to produce something novel, insightful, or interesting. The goal is to prove that you absorbed the material and were able to formulate a coherent response based on it.

The hope is that the student will eventually be able to write something that isn't bullshit. The AI will never produce anything other than bullshit, at least without a significant technological revolution. The AI can nonetheless deliver bullshit better than a child, despite the child having potential to eventually do better.