While your analogy is valid, I find it hard to get upset at people who flout an artificially imposed limit to a license to engage in employment.
I'm aware the vehicles and drivers were at first highly unvetted, but the moral impulse that's got everyone so up in arms about prediction markets isn't remotely the same as Uber smashing through antiquated monopolies that existed more by historical accident than any unavoidable public safety need.
Exactly. While there isn't much of a legal distinction between regulatory capture and consumer protection, there's obviously an ethical one. Uber was ignoring rules that apparently mostly protected established investors rather than end-users of car-hiring services.