Sadly, most people really are that dumb.
If they weren’t TikTok, Facebook, Instagram, Snap, etc wouldn’t exist.
People are, in fact, aggressively dumb.
But not everyone, that’s why places like this exist though the privacy community will always be somewhat niche. But we can nudge the rest of society occasionally in the right direction. HTTPS is now standard and many people routinely use encrypted messaging apps.