We're at an inflection where in the future we will either retain some control over our devices, or almost none. I'm done arguing for complete control, that's boat seems to have sailed. I'm just trying to influence people to not throw away all their control at this point.
Which is that even incredibly smart, incredibly technical users will still click on random dialog boxes and open phishing emails.
I understand where you're coming from but I wouldn't bet on a future where users are going to be somehow smarter about this sort of thing.
For instance, the /System folder is not writable unless you reboot into single user or recovery mode, then run commands in a shell.
Several app developers (including Mojang with Minecraft) recommended turning off Gatekeeper to run their apps rather than dealing with developer signing or because they did not want to purchase a signing certificate. Apple eventually removed the option to disable gatekeeper from the UI (but retained it as a shell command).
The 'advanced user' override to run these apps has always been to select 'open' from the finder/context menu - but simply double-clicking on an app will give a failure screen, not an override/consent screen. (Yes - rather than telling users to right-click on their app, third parties told the users to disable app verification and quarantine for the whole system.)
I find it surprising how lots of people who live in democratic, free societies, still have this urge for authoritarian solutions to every problem.
The history of the judicial system has shown that even incredibly smart people will sign contracts that are clearly to their detriment. Does that mean the appropriate solution is to only allow contracts that have been vetted by MicroLaw incorporated?
Overall, history is full of smart people doing dumb shit. The only way to completely prevent that is draconian authoritarianism. I would think humanity should have understood by now that that doesn't end well.
It's not so difficult if your MacBook trusts Apple, Google, Amazon, and Microsoft out of the box.