The betting markets were  wrong about who would control the Senate in 2022. They're not exactly Nostradamus. 

If we're putting faith in prognosticators, what about the "13 keys" guy? He's only been wrong once (and that's only if you believe Gore truly lost in 2000) and he's predicted Harris will win. So are the prognosticators right or wrong? Or only the prognosticators that are predicting the result you want?

The truth is nobody really knows which candidate is going to win until the votes are counted.