>With proper constraints, there is a major positive externality in aggregating public and private information through market mechanisms. Robin Hanson wrote about this subject extensively. Dismissing it outright as a zero-sum game is a bit naive.

It's only gambling when you are betting of completely random events. If you know what the odds are of something happening, even with some approximation, then it is not gambling.

Of course, over 99% people placing bets on Polymarket are gamblers, but some aren't.