We have technology in our hands right now, that not a single one of us, could resource-in, to rebuild it, if we had to. We can't reverse engineer most of our personal daily items. That's a problem. For example: The technology that I can repair, is as far as humans should push it, for now, until we're all able to rebuild what we all use, daily.
For example of what I mean, I can take apart my 1990s car and replace components, and get her down the highway. I can take apart my Dad's 1966 C-10, and replace components, and get her down the highway. I can take apart my house's plumbing, roof, walls, etc, and replace components, and make her look good as even and in most cases, I strengthen and make it better.
If we can't repair or manufacture homes or transportation, or even maintain or manufacture communications and energy transmission equipment, then our next generations after our children, are going to be F**KED, as far as being controlled.