There's another thing. There are some things that I just don't really know how they work, but they do, and I trust them, although I'm amazed when I try to think the process through in simple steps. (Computers I guess, I know it's representing data in ones and zeros, but beyond that, it's over my head. I can do what I need to, and trust others to do the rest). There are other things, like planes, that I understand how they work, and trust them, but still have that sense of awe that they do work, on the scale they operate in.
I'm trying to think what I don't trust, and I'm afraid it comes down to human nature. Things like ID databases, I should be happy enough to have my info on there, but it's the human interface I don't trust to get things right.... Self driving cars armed with sonar and automatic distance gizmos and all that - yeah, they will work, but give a human being a single item of control, and they'll muck it up eventually...