The thing that concerns me about this perspective that everyday use of encryption is bad is that it makes no damn sense. Pandora's box is opened; if you force software solutions to backdoor their technology, someone will just step up who doesn't care about your laws. There are no global treaties on software development, and we aren't going to be signing any such thing any day soon. Even if we could force something like that down the throats of every country on Earth, the knowledge exists, and anyone can roll out their own solution with a high-school level understanding of the topic.
It's absurd to think this can be resolved through legislation or cajoling companies into cooperation. But what really bothers me about this whole issue is that we already have laws in place that handle this situation, at least in the USA. In the USA, if you refuse to hand over an encryption key (or can't) and are being compelled to by a court, you can and will be held in contempt of court, and possibly convicted of destruction of evidence. The only thing that forcing people to backdoor their crypto does is allow government entities to investigate people without having sufficient evidence to compel them to give up their keys, and destroy the marketability of large scale, centralized end-to-end encryption solutions.
I mean, you could make the argument that end-to-end encryption restricts the ability to wiretap people, sure, but a wiretap warrant should require a decent amount of evidence, and at that point, there are most likely other options.