It isn't a viewpoint. It's a fact. I'm using signal for almost a decade now and only managed to get a dozen or so people to use it in any capacity. Most keep using whatsapp as their primary method of communication anyway.

What books would you recommend, that proof that connection?

"Privacy is a precondition to democracy"

>Read a couple books

Maybe you should? It might help improve your reading comprehension. The person you're responding to said that most normal people don't care enough to switch to a vastly less popular app, which is obviously true.