This says more about you than the other person. Some people like giving good answers and are less concerned about being the source themselves.

I'll sometimes do the exact thing you are talking about. The reason is that I basically know the answer, but also know there is a nicer explanation to the question. I'll type in the question, often iterate a few times, get an answer that I basically knew but couldn't explain as clearly, and respond with it.

Humans haven't been "self sufficient" in 100,000 years. We've been building/using tools and specializing since the start. If you went back just a few hundred years some people (the version of you basically) would be profoundly sad you couldn't build your own house.