you don't need to understand them

Part of the problem is that there are a lotof people who not only don't understand, they don't want to, and will actively try to avoid it, even if it's required for their job. I have a coworker who will actively sabotage her tasks that involve even basic office use because she hates tech. Just yesterday she managed to lock herself permanently out of her apple account and lost EVERYTHING because she refused to do any kind of setup to make sure she knew her passwords or had her shit backed up. Years of stuff gone.

There's a lot of people out there like that.

You can include Google as well as Linus, considering the majority of compute hardware on the globe exists due to those two entities.

Sure, but with something so powerful and versatile at your fingertips, you'd think more people would at least want to know a little more

People don’t need to know how an engine works, the same way I don’t necessarily know how a BIOS or a kernel work. Their understanding of computers is worse than that. For cars, they understand that the gas pedal and gear makes it go forward or backward, the wheel turns it, and brakes stop.