There's a weird relationship between electricity and self-confidence that I've never quite understood; suspect it's similar to the phenomena that enables math to be the only general academic subject in which it is socially acceptable to suck at, and/or related to a lack of "correction window" when tinkering with forces that propagate at the speed of light.

That being said, I'd posit that having a set of technical manuals at your disposal would dramatically change this perception to the detriment of certain lucrative service markets. Everything breaks; the real question is who has the capacity to administer repairs, and at what cost?