It's true that you can use LLMs as a learning resource and to unblock you. But students just aren't. They are using them as a way to avoid thinking, avoid research, and just spit out an answer they can paste in to their homework.
Because the students learned that school is designed by old morons, without understating why writing book reports and doing math drills has the intent of creating students that can read and write or learn other transferable skills.