I had a hard time understanding why people wouldn’t be more conscientious of their privacy, until I had discussions about the issue with people close to me.
My folks had a very similar sentiment to the typical “if you have nothing to hide, then why do you worry about it”. My girlfriend had the same thought, but took it a step further and asked why I cared so much about people uninvolved in my life knowing personal details about it, then said I was “the most paranoid person [she’d] ever met”
Once the Cambridge Analytica scandal broke, they all understood my point. I think the majority of people who don’t work in tech don’t understand the massive implications that our lack of privacy has. They don’t know how cookies or backends or tracking pixels work, and may not even know they exist. They imagine an NSA agent sitting in a room looking for keywords, not companies that they entrust their digital lives to selling off every little piece of info about them. It’s so much more than your Facebook or Twitter posts being public, it’s data that we might not even know about ourselves being kept in the hands of unknown entities.
To sum up this rant, some people have to see it to believe it because this is outside their scope of knowledge