alt Hacker NewsGambling outside of equities and securities is a negative externality. (Investment in startups, goods, etc. makes the economy spin. Investing in what hoop a ball goes through does no good at all.)
This puts plenty of people who shouldn't gamble into debt and lowers their societal fitness.
The other side of the gamble is probably losing on average too. Only the house and infrequent insiders win.
These private companies are fleecing our economy's dynamicity without reinvesting it in aligned positive externalities.
It's a cancer.
At least the lottery goes to education, in theory. My college was subsidized by the lotto, so there's that.
Kalshi and PolyMarket aren't doing anything positive.
It is not for you to decide what one should or shouldn't do. Plenty of people want to gamble, and don't give a fuck of what you think they should or shouldn't do. And they are right: it's none of your fucking business.
Kalshi and PolyMarket are doing something absolutely wonderful for those people (i.e. the only people who should care about these "prediction markets" at all): they actually make betting fair, which was impossible before. It is not impossible now, because in fact there are much better decentralized markets than these (basically all you need to make a completely decentralized betting platform are Ethereum contracts), but they are handier to use and hence more popular. But it was impossible with traditional gambling, where a bookmaker can set any odds and reject any bets.