There are situations when a mission critical system failure would be more horrible than we want to consider in our day-to-day thinking.
One of my favorite “downtime” activities is skydiving. The airplane climbs to an altitude of 12,000 ft, I dive out of the plane door, and the force of gravity accelerates me toward the predictably hard earth at speeds of up to 160 mph. And yet, during this anti-survival instinct sport, I have total confidence that my equipment will not fail me. How can this be?