Exactly my point. Just like you don't mount cameras in everybody's bathrooms, you don't outlaw encryption. Instead, you install spy software on your target's computer, or you plant a bug in their light fixture, or subpoena Facebook to see if they ever messed up and said anything unencrypted. You can still find things out even if someone is being serious and uses end-to-end encryption, just like you can still find things out even if someone is being serious and burns their incriminating poo-peanuts.