Gamblers don’t always get it right, but this page has some interesting history: electionbettingodds.com/about.html

Gamblers, polls, and the NYT’s most sophisticated prediction algorithms all got it very wrong in 2016, and severely overestimating hillary and underestimating trump. But of those three, the prediction markets were the least wrong.

You’re not wrong, it’s because leftists are generally much more critical of gambling.