In my line of work, its certain peoples' jobs to know certain things. If I need a piece of information that somebody else is responsible for understanding, I'm just going to ask directly for what I need instead of trying to research it myself. To research it myself would mean attempting to do somebody else's job, which is just unhelpful for everyone.
In my professional experience. About 1 in 10 people does that. Maybe, 2 in 10.