On the other hand, that something is rare does not mean we should dismiss it because it is rare. If humans get together to set up a system then edge cases that

On the other hand, that something is rare does not mean we should dismiss it because it is rare. If humans get together to set up a system then edge cases that are high risk like this (high risk because risk == chance of occurrence * effect) should not be able to happen. Do NASA just shrug every time a rare occurrence ends someone's life? I hope not, and the care system is not rocket science so there's even less excuse for an heedless attitude.