He needs to be more blunt. Let me assume the Jefferson position for a second. Ahem...
There will come a time when our leniency toward strong encryption will prevent law enforcement from doing its job. Some sort of violent attack will occur, a murder or a bank robbery or even a terrorist attack; and the public will demand answers. The public will want to know why we weren't able to break the veil of secrecy around our enemies's communications, why we couldn't keep up with them, why we couldn't protect those we were sworn to serve when we, all of us, from the lowest law enforcement officer to the highest government official, took our office.
There comes a time when a nation must decide where it places our value. We all want those basic rights of freedom of speech, freedom of religion, of security from search and property seizure, of privacy. At times, those rights interfere with our safety, and we must decide: Do we prefer the risk of terrorist attack, or the risk of being arrested for our political views and our opinions? Do we want the chance, however slight, to overhear a plot to blow up a school or a shopping mall; or do we want our private conversations to be private, to be our own business, without fear of law enforcement or government finding something to worry about in our own personal lives?
We decided long ago that our officers, our legislators, our executives are here to defend us, not to pry into our lives or raise us like children. We decided long ago that our rights include privacy and personal security from government intrusion. When, in time, these decisions cause us pain and loss, we can look back and say we accepted that when we wrote the rules; we can look across at oppressive regimes and say we are glad we are not them; we can assure ourselves that the decision was correct, personally, for every one of us save a few lost, an unfortunate consequence of doing the right thing for all of us.
A strong society recognizes that the Child of Omelas cannot be saved; but it also does all it can to comfort the child. We cannot protect everyone, and we won't do any better by removing their protections and stripping their rights; we can only work to find better solutions despite the difficulty basic human rights pose to our security.