I think there are a few members (moderators) who are very dedicated to answering posts, when they get a chance. As for many (like myself), I try and breeze through when I can and answer a couple questions, if I know the answers. Some other people may fear posting the wrong info even though they've been in the hobby awhile. And some people just hate answering the same questions over and over again even though they know the search engine doesn't work all the time and at one point or another, they were asking the same questions.
tom