I wouldn't hold fighter jets up as an example of safety. They spend more time broken then they do operational. Require a an entire team of engineers for each ai

I wouldn't hold fighter jets up as an example of safety. They spend more time broken then they do operational. Require a an entire team of engineers for each airframe, and the number of pilot deaths/flight time is pretty atrocious. But since it's 1-2 pilot deaths rather than >100 passengers we put up with it. A well designed aircraft should not have a single point of failure, including the software.