I can't answer for anyone else, but for me this is all a game of sorts. I try to figure out where things are headed, and position myself accordingly. It incorporates a love of history and economics into something interesting and useful (trend analysis and forecasting). So naturally I am attracted to interesting news items and discussions on where things could be headed. So for me, reading other people's opinions even though I often times disagree with them on the "why(s)" of it all, and discussing/debating these issues, is of value (and fun).
I totally get that it's a hobby, and therefor offers a type of gratification. But fun? These threads are full of doom and gloom, and induce images of people sitting in their living rooms peeking out their blinds with AR15s across their laps.