You have to consider the risks of false positive vs false negative identification. From a state point of view, a false positive will cost you the life of a cit

You have to consider the risks of false positive vs false negative identification. From a state point of view, a false positive will cost you the life of a citizen - very unfortunate, and a tragedy - but in the end nobody is irreplaceable. A false negative exposes the state at risk, which affects everybody, possibly leading to catastrophe. In a risk vs reward scenario, it's vastly better to have a false positive vs a false negative. But this is not an easy decision to make. We are humans, and emotions and empathy are very strong - we don't want to hurt anybody, and normal people are reluctant to hurt other people no matter how logical it seems. This is why you want a paranoid in charge - somebody that is so afraid of making a disastrous mistake that the emphaty and emotions are suppressed.