Maybe AGI is impossible not for any technical reasons, but because AI is a self-limiting technology? As AI improves, it destroys the educational system that creates the researchers that develop it.
LLMs democratize personal tutoring. AI can massively improve education, if done right.
They are working well now because they live off the pile of human-created online content. Give it a few years. When all the AI has to feed on is the output of other AI bots, they will likely hit a reality wall and halucinate themselves into insanity. Forget new physics. It will probably be hard to get an AI to admit the earth isnt flat.