In my experience preaching this same thing to many users at work and just personal friends, they won't change their ways. Because "omg not another password to remember" and "that's too much work to login just to get a password".
I've just stopped trying to educate people at this point. That's on them when their info gets leaked or accounts drained.
Mom took the door off my room due to her not trusting me? Smoked a lot of weed but never ever in their sight or in the house. All I did was sit on my computer in my room. Absolutely horrible experience.
She ended up putting the washer and dryer in there with me too..