What's unrealistic about it? I've been doing it for more then a decade.
E.g., People for whom significant, immediate, unexpected mechanical feedback in operating something simple, like window blinds, wouldn't cause them to consider whether they might be doing something wrong, and instead continue operariting the blinds in the wrong direction until they snap and break, genuinely being unaware that they were doing it wrong.
People who are genuinely lacking the common sense you'd expect a human to have, not even with any cognitive disability or learning disorder of any kind - just genuinely stupid but otherwise ordinary people.
Ironically, that's a stupid assumption to have. You might be in your own bubble, but I know many very intelligent people who do not have the time or interest in gaining digital privacy. It's not as easy or without compromise as you seem to think.
People who care will figure it out, and those who don't will be left behind.
But no, thats not acceptable because you have to gouge everyone to make as much money as possible nowadays.
I often have trouble convincing people to install Signal, which requires about two minutes for people who barely know how to use their smartphones and under one for people who know where the app store is. If a majority people don't have the motivation to do that much, we have a very uphill battle.
People who care will figure it out, and those who don't will be left behind. Is that not the case for most of history? Atleast apps as you say are accessible to everyone without them having to invest a second thought.
Why should the average joe have to consider a second thought? If my Dad wants to watch his favourite TV show, he should be able to do that in the most accessible way possible.
Perhaps Microsoft shouldn't have built a GUI and should've kept the CMD line around so that we would've all had to learn to "do it the hard way" and wouldn't have been infantilizing us with buttons, graphics, file explorers, hyperlinks and applications.
Yes, I agree that everyone should have access to those technologies by default. I also think that the implementation for the layperson will make the projects almost unrecognizable.