Because you can easily collude and cheat at poker so it needs to be heavily regulated or outright illegal to prevent theft. You can't really cheat at prediction markets, unless you have insider information which they can litigate after the fact.
replySurely you’re being facetious, insider trading is obviously a huge problem that is rarely enforced and we’ve already seen instances of people actively influencing events or using false information to fake the result of a bet
reply> You can't really cheat at prediction markets
replyLots of folks gripe about how Kalshi adjudicates contracts.