An argument not mentioned here and which I didn’t appreciate until I actually took part in these markets myself, is that you need a supply of stupid/uninformed people to take the other side of the informed people’s bets.(In economic terms, no-trade theorems apply.) That suggests to me that the dream of perfect information revelation isn’t going to come true. Instead, the liquid markets will be those with a large supply of marks, who bet for identity reasons or who are simply ignorant and naive. (Currently polymarket gives a 16% ish probability that Trump will lose office this year. Sounds like wishful thinking to me?)