Earlier quoted context omitted.
Manufacturing certifications, installation and maintenance inspections and certifications, auditing, etc. To put it into some relatable context, a simple electrical switch that you might grab for a few bucks at your local Home Depot would cost at least several hundreds of dollars because of all the red tape that must be satisfied for safety reasons. Safety isn't cheap.
The extra cost for safety is reducing safety because it's causing this not to get installed. Maybe it's worth having a worse system that actually is there.
When I was an intern I got to help change the blinking red light on top of a 50 story building. It’s a big deal that was scheduled weeks in advance and probably involved two dozen people, a special lightbulb and a bunch of coordination.
Even among the team working it plenty of “how many X does it take to change a light bulb” jokes were told.
But consider than a pilot depends on certain things being there when things go wrong. If the weather is bad and there’s issues with instruments, seeing that red light is the difference between life and death. There are potentially dozens or hundreds of people on a plane and if I recall correctly up to 4,000 people in the building.
When life is at risk, the standard for engineering must be higher.