Since economics touches our every day lives so often, people often think they have a lot to say on the subject but underestimate how little they know. Imagine if you got the same group of people with the same educational background from HN together (college-educated, usually, but not a specialist) and had them debate unsettled questions in geology or astrophysics. Surely not a single original or useful insight would come of it unless an actual geologist or astrophysicist happened to stop by, and I think economics is closer to those subjects than some people realize.