I don't care about insiders cashing on on adventurism. Or, rather, I care about the adventurism, but I do not care even a little bit about the impact of it on gambling platforms like Polymarket. I think I'm on reasonably firm footing when I say that (a) the inventors and popularizers of modern prediction markets and (b) US law doesn't care either.

The irony here is that the one bank-shot argument I'd see in the medium term for "insider trading" enforcement at places like Polymarket is Nevada Gaming Commission-style gambling regulation.