resqcapt19
What is the dollar figure when it becomes worth it.
What is the value of your life, your Mom or your Kids Life's what price to save them?
Why must it be fail safe?
As has already been pointed out many things are not fail safe.
Smoke Detectors
Circuit Breakers
Motor Overloads
It does not make sense not to use it because it is not "Fail Safe" if it fails it makes the circuit like any other circuit we install. This is the same result if we do not put them in at all, which is what you seem to be advocating
But those that don't fail, must be working ready to save a life.
Even if its just one life, that one life is greatly important to someone.