The two failures
Blind trust and emotional override are symptoms of the same missing information.
An engine that emits only a tier invites two opposite pathologies. The first is blind trust: the operator deploys at whatever the box says without knowing why, which means they can't catch a bad input, can't notice when a stale reading is driving the answer, and learn nothing from years of decisions. The second is emotional override: the output feels too low after a good week or too high after a scary one, and with no visible reasoning to argue against, the operator substitutes their mood. Both are the same deficiency — the decision is opaque — and both dissolve when the engine shows its work.

