I think you give too much credit to the level of technical knowledge of the average person.
They understand mouse, keyboard, screen,... and Internet, which is their browser.
This is not to make fun of them. I drive a car and only know where to pour gas. I have zero interest in anything else in the car, I just want it to work. Carburator? Spare tire? Not interested.
If you like car analogies so much, the car equivalent of bookmarks is programming the radio's bookmark buttons to tune your favorite stations. I am not a car mechanic, but I sure as shit can do that much. For that matter, I also know that my car doesn't have a carburetor but has a spare 'donut' tire in the trunk. You too probably know these things of your own car. Again, I am not a car mechanic and neither am I some sort of polymath genius with advanced general knowledge across a broad number of domains. Cars interest me about as much as American football, which is to say not even remotely. I'm just a regular Joe who's not a complete imbecile.
I work for 25+ years in IT in huge technological companies. I can tell you that in these technological companies the level of knowledge about things above the very basics (and how to use a bookmark is way above that) is poor to say the least.
This is something I know very well, not some kind of vague deliberation. If you have managed IT operations in a large company you would know. I therefore assume that you do not.
Now - expand this to the whole population.
And as for the car - I had to check if I had a spare a few weeks ago, when the car mechanic who was coming to fix my punctured tire asked me. He had to direct me as to where to look. I am probably an idiot, of the kind of idiots who are not interested in cars. But I do not call the ones who are not the same.
If you were stranded with a punctured tire in an area without cell service, would you have died from exposure? Or would you have figured out how to change your tire? I don't think you're an imbecile, so I think you would have figured it out. It's an easy sort of problem for an adult human to solve using little more than common sense, even if you've never been taught how to do it and never cared to learn anything about it before. The general population is capable of much more than you give them credit for.
So yeah, you indeed never worked in IT then. Never mind, this discussion is already beyond ridiculous.
You introduced the shoelaces level unnecessarily at the start of this whole debacle. Computers are, to the people we're holding under discussion here, a BAZILLION times more complicated. You can't make your shoes vanish by holding a lace slightly wrong. You can make your work 'disappear' in any of myriad ways, by accidentally mistaking a single keystroke, or leaving out a step, or doing something 'extra' as one person put it to me.
And the tire analogy is also skewed. Tires are another thing that's phenomenally less complicated than computer use, to someone who hasn't studied it yet.
You're holding up much simpler concepts and saying that if people can figure out a 10^3 complicated situation, they can figure out a 10^50 complicated situation.
Work any sort of tech support and you'll find that many people who are otherwise intelligent, capable, and at the top of their field look at a computer as a box that they do certain specific things to, and it does those few things that they understand. They've never needed to delve, so they don't, and things even as simple as Windows shortcut keys outside of Ctrl-X/C/V, or any browser use beyond open it, type in the search box can be utterly mystifying.
Then take a person at that level of understanding who is paranoid that if they do something wrong they won't know how to get back, or that they'll lose their very carefully memorized workflow, and try to teach them something new. Even one small change that would save them surprising amounts of effort.
Most people _aren't_ imbeciles, but when it comes to things they don't know on "that box", the edge of the world is very sharp and bottomless.