I am one of the very few people in the United States who actually does still earnestly believe prediction markets do in principle serve an immense social good that can't be provided in any other way: https://www.astralcodexten.com/p/prediction-market-faq
Just, in practice, Polymarket and Kalshi are (unsurprisingl)y run by people who solely care about how much revenue they could ever possibly inhale.
And everything else about them is so unethical and so destructive to the commons I would support them being metaphorically razed to the ground.
Like, just the Kalshi and Polymarket Twitter accounts alone contribute more to disinformation (disinformation, not misinformation) than Alex Jones could ever dream of. And then all the accounts affiliated with them make it 1000x worse. And then they have so many other unbelievable scandals I'd have to write a wall of text to list them all. Tons of egregiously machiavellian, intelligence agency-tier tactics and operations.
The only prediction markets that seem to be mostly upside with minimal downside are the ones that do not accept real money.