In other words, I do not give one shiny shit if the evil terrorists encrypted their data and the police can not recover it - even if it means good people (even my family) die because of it. I care about their actions - not their encryption.
You assume that has is mutually exclusive from the other. One of the major achievements that turned the tide against Nazi Germany was deciphering the Enigma machine. We knew plenty about their actions, but couldn't predict their attacks ahead of time. Deciphering Enigma allowed us to predict (and prevent) attacks. Intercepting communication between terrorist groups is no different.
As I said before ... no right exists without context. If the benefit of allowing unbreakable decryption outweighs the cost in terms of lost lives to terrorist attacks, then fine... This might be true today but don't assume that it will always be true. It wasn't true in WW2 and it might not be true in WW3. Enjoy your encryption in the meantime.