>LLMs are incredibly effective tools when paired with textbooks to master subjects like undergraduate physics
I agree that they can be helpful for explaining things if you're stuck. But since you used the example of physics, the majority of hard won physics knowledge comes from working lots of problems yourself.
Too many people are already used to LLMs circumventing the laborious aspects of things, so it takes a certain person to withhold from just having the LLM solve the problem for you when you're stuck.
Until we can figure out to teach people to fight against their instincts, then I don't think LLMs will lead to better long term outcomes.