This issue reveals the gap between the prediction market premise and what these things actually are, which is: unregulated prop gambling venues. If things like Kalshi and Polymarket are prediction markets, then, at least as far as the intrinsic concerns of the market itself are concerned, insider trading is a good thing; literally part of the point. If they are instead how they function today, then insider trading is…
You can disagree with the libertarian argument, but I don't see how you can say that Polymarket et al. are something other than a prediction market. Can you explain where you see the difference?