Re: OMFG
Well even if you cannot change people themselves, you can easily influence their behaviour. How many people do you know that got electrocuted by their household appliances? With all those appliances around, that must be a high number, doesn't it? The fact that this number is rather low is that household appliances are designed to prevent you from doing stupid things. You cannot simply touch any conductors inside, because they are encased in plastic.
However in computing there is no sense for security. Yes we tell people not to execute code from the Internet, yet when you click on a link to download an executable in your browser, it'll actually offer you to execute it right away. That's a stupid thing that should never have been offered. Same goes for all kinds of app containers like apk or flatpack. If you click on a link, and your system will install software that's a _really_ bad thing.
Instead you can make stupid things hard and provide safer alternatives. This then will influence people into not doing stupid things. Also make sure that the things they actually need to do (e.g. opening PDF files) is as safe as possible (e.g. not using a feature complete PDF reader).
BTW the stupidity doesn't always just lie on the end user side, often it's also in the IT departments. Just think of the many computers that have office software installed without needing it, or Acrobat Reader when a more secure PDF reader would be good enough.