This is my concern as well, since I learn so much by incidentally reading docs and example code. That said, many people copy-paste Stack Overflow code without reading or understanding it. So, this is not a new problem.

I definitely learned a lot. Since I had to cross reference to text books, Wikipedia, and github, I gained a good grasp of the material. It helped that I had a math and stats background, though. But, I imagine learning linear algebra this way would work well too.

Not necessarily, no. I still need to refer to the docs, but now I get some additional context. As a simple example, if there’s some library that needs initialization I can ask “how do I initialize a new <library thing>?”. Then it’ll spit out a maybe correct example of initialization, but most importantly it’ll have some new keywords/functions/buzzwords that provide extra context for my manual search through documentation & source code.

If I were a student, yeah it could probably do my homework. As a professional, I find that it greatly helps me navigate through related ideas.