Your comment made be remember a Twilight Zone episode where a larger computer was hidden in a cave and its output [daily advice] allowed a small community of survivors of a nuclear war to survive.
A couple of outsiders came into town to claim they were in charge now of the towen which was inside their territory. They beat up the town leader after he resisted, told them they did not belong there and needed to leave. The antagonists in good party demonikraps fashion divided the people, fearful of beatings, against their wise leader, destroyed the computer and told the people they could eat the canned food that the leader warned (on advice of computer) was radioactive and would kill them. They all gorged themselves with the food ... and only the leader survived.
Is there anything old episodes of “twilight zone” can’t teach us?