If only. I suspect that only tech enthusiasts are aware of these issues. In the meantime, non-technical people only give you weird disbelieving looks when you mention this to them, and then continue ignoring it.
It’s psychological. People can’t believe things which would make it too hard for them to stay the person they currently are. It’s almost impossible for anyone to do anything but ignore and repress such information. If you ask them later about it, they probably would deny even hearing it or having the conversation, because they wouldn’t actually remember it.
Ask anyone who tried to convince a sweeping societal change based on logical arguments. See what happened to Ignaz Semmelweis. You simply can’t convince people of hard things with logic.
I personally think security has been spoiled by unrealistic advice. "Use PGP" is the worst, but it's not alone. A few years ago a mass-market device (tens of millions sold) asked me to enter my password three times within two minutes in order to carry out one single operation, and it demanded that the password be secure enough that I needed two kinds of mode-shift to enter it on that device's keyboard. Who takes that vendor's ideas about security seriously after experiencing shit like that?
People might say that they want security, but when some logical person takes this literally and respond “Use PGP”, they might be logically correct (since as bad as it may be, there might not be any secure alternative to PGP), this advice will always be ignored because what people want is not actually security. What people want is to feel secure while not changing anything about what they are doing or how they are doing it.