Aside from the current horrible admnistracion. If I understand correctly, One of the strengths of prediction markets is to try to get the insiders to come in and provide insider information thus improving the total info available.
One of the weaknesses is incentivizing people to do horrible things, if that makes their bet a wining one.
It also incentivize people to follow the events and remember stuff so that they are better equipped to make predictions.
I think it incentivize people to use their head and may be even select better leaders.