To me this quote from the article, with out any qualification is just fear mongering. People need to know that strong crypto, when implemented correctly does work.
I recently tried to get a number of my friends to install Signal on their phones. I was quite surprised that most of them, even the technically minded ones, refused to install it. Their reasons ranged from not trusting the software to worrying that using it would draw government attention. And this in California.
Encrypted SMS, email and phone calls should have been standard tech from the beginning. Everyone should use crypto in their day-to-day lives, not because they have something to hide, but so that free speech and privacy are protected.