I'm not talking about knowing to the last detail. I'm talking about basics. It's not about everybody have to know all parnubers for their cars or exact schematic of smartphone, it's about knowing that car have an engine with pistons that driven by spark ignited flashes of fuel and that turn gearbox that drive the wheels through the shafts. Literally very basic impression of how things works that changes a lot.

Is it hard for plumber to understand that internet is some kind of pipe system for information and that if you pump your data to some corporation tank instead of pumping it to buddy pot, it is already not your water and corporation could do whatever it want with it?

Things are not as complex as miscellaneous bastards want people to think. I'm amased how ignorant people about their things and how they amased that things are simple when I explain how they work. My friends, including girlfriends too, from yoga coaches to mathematicians and psychologists saved a tons of money and nerves, just because in some point of time I show them how their cars, computers, home appliances, etc, works, so even with that basic knowledge they could not be fooled by "professionals" and marketing bullshit anymore.

And don't tell me that one have to work a job to feed the family and have no time to spend on on learning. If work eats all your time leaving nothing for self-development, than something completely wrong with your work and your attitude to it.