I think cheating is a more prevailant issue thanks to LLM's but from personal experience I can say they have really helped me better grasp concepts that a professor might in a classroom.
That translates to better comprehension of exam problems and being able to tackle to problem in new ways thanks to better understanding the actual issue.
Maybe AI should be the teacher, not the student. That is, used to tutor and educate, not to supply students with neatly packaged answers, but to challenge them to learn and judge when they have grasped a topic and move on to the next.
You know, a personal teaching assistant. Who wouldn't do better with one of those?