You unfortunately can’t teach something like this to someone who doesn’t even understand the consequences of it. Or care.

You can absolutely explain it and teach it and make people care. It’s just not easy. I’ve only ever encountered uninformed “I have nothing to hide”-responses to equally lackluster throwaway explanations . It’s a very difficult and abstract topic, it doesn’t come naturally! Don’t treat privacy concerns as equivalent to pointing out dirt on someone’s clothes, treat it like calculus. Successfully conveying it requires time, conversation and didactics.

I personally nerver really understood the whole semantics debate that always unfolds in situations like this. What does it matter if a piece of software is truly libre or how it is licensed as long as the source code is available? Respecting a license is a choice. If you have the code you can fork it. Whether it’s libre or not only influences your ability to put your real name under the fork, doesn’t it?