You complain that it doesn't explain this or that, but you can just ask it: it's a discussion or a dialogue: what books can say that? I'm not discounting good books or good educators, it's just that LLMs are good too, I think. These mediums, if you can call them that, have their overlaps, but they also have distinct strengths. I wouldn't be so quick to berate either. Your quip about stitching SO content is funny, but that's hardly what's happening, right? Unless you're willing to say the same about humans.