Be careful. Speed of learning isn't necessarily the goal. Durability is another metric. I learn more quickly with LLMs, too, but it's certainly questionable if that learning is as durable or deep as learning through struggling with a book.
The students of lowly-rated profs had better 10-year outcomes than those with highly-rated profs according to a study that I think came out of the Naval Institute a decade or two ago. "No shine without friction."
We need more data. Certainly turning students loose with AI stunts them. There's probably some happy medium. But where kids need the most practice with fundamentals when they're young, a blanket ban for now seems sensible. And it also seems like a good plan to introduce it when they get older. I suspect we'll learn a lot from this Norwegian experiment.