pretty much exactly my experience with Canadian and American family. People didn't give one iota of a fuck when the Snowden revelations came out because they just assumed that it was the case already.
I think the average techie underestimates how important platform lockin + user interface design + ubiquity are. Once something like Facebook Messenger has reached a critical market share trying to get people to stop using it, no matter how privacy violating FB may be, is about as effective as trying to get people in the year 1985 to disconnect their house's analog telephone line.