This seems like an example of what the parent comment was saying, which is that everyone learns best in different ways. Learning via book works better for them, but maybe not as well you you. It still isn't clear to me that an LLM would be more effective for everyone in the circumstance you described though, and I think that's the point they were trying to make; new learning techniques are mostly helpful because of the variance in how people learn, and in practice the best choice is likely going to depend at least as much on the individual as the circumstance and topic.