Prediction markets are often, maybe even usually, wrong. Expert consensus is often, maybe usually, wrong. It's good that skeptics point that out. But skeptics should also point out that we have NO BETTER TOOLS for making predictions about the future to guide our decision making.
In particular, it should be more transparently acknowledged by skeptics that the best critical analysis of the failings of both expert consensus and prediction markets is done by -the relevant experts.
An example of this common failing (I've also seen it demonstrated by Jonah Goldberg, and I believe, by Will Wilkinson):