The youths literally do not care from what I observe.
How many people under 25 do you interact with on a day to day basis?
There are bubbles, you are obviously in one if you do not know any privacy concerned under 25. I know 15 year olds who are extreme privacy freaks, then I care about it so it might be easier to find those people. I do find that it is the people that I think are least likely are the one who are the most extreme.
I'm pretty sure they care who takes pictures or videos of them. Try going on a train and taking pictures of a young woman or man. The only difference is these are less noticeable.
Don't forget the older people, many of whom gladly use Facebook or WhatsApp without a second thought.
Us HN weirdos are some of the last who care, and even we disagree on which tech is creepy. Hard to blame the average Joe for giving up.
I know about 20 and 2 of them are without socials and even smartphones. Its a counterculture
HN is an echo chamber who can't imagine not using some tech. Normal people can...