> You make it sound like it's a fad
Privacy is not a set concept.
If you had told my parents in their youth, that their kids would have a high likelihood of happily divulging big chunks of their private life to the world at large, as a matter of routine, they would quite literally not even have understood the concept, no matter in how much detail you would have explained all the steps leading up to that. Why would anyone want any of that?
I am building a small business in the medical field right now. People are real sensitive about their data – right until the point where they happily waive all privacy rights to push you to use WhatsApp for all sensitive communication, because, OF COURSE they'd want to use WhatsApp, what else, it's real convenient after all.