It’s all about risk profiles. The failure of a bridge or an airplane is catastrophic and people will die. If a SaaS provider is down for awhile, people are frustrated.
Last time i had to get roadside assistance, they couldn't use a mile marker / highway location reference. They had to have something to type into google maps in order to dispatch help.
Could they have gotten to me if google maps was down? Probably but i'm not sure. Either way, it wouldn't have been the practiced default and that matters.
Some upfront thinking would help us (developers) save a lot of effort and frustration
And, obviously, software is in charge of actual security in the real world, and the track record there is not exactly flattering! Safety as well, of course, but luckily safety-critical software is a much smaller and usually more rigorous subfield, quite unlike the case with security.