Isn’t the pretence important? If I talk to a bunch of people at the pub I’m likely to get various answers, increase the size of the pub and I’ll get to hear all kinds of different stuff and since it’s just people at a pub I can take it or leave it at my will. But when there’s perceived authority involved, a trusted newspaper, maybe a uni lecturer, that kind of thing, then it’s easy to be frustrated that you still have to treat them like people from a pub because they’ve spent considerable effort having me believe they’re better than that. Maybe it’s the difference in expectations between brainstorming and a final review, or a professional and an amateur.