There is an unarguable downside to unbreakable encryption.

The arc of technology is in the direction of unbreakable encryption, and no laws are going to get in the way of that reality.

Apple and Google want to create encryption for which they could not provide you the key. Their business model will not survive if the American government has a special relationship with them that requires them to surrender this kind of information.

Well, see, there's a downside to that, too,

I told them that free people always had to decide where to draw the line between their liberty and their security. I noted that the attacks would almost certainly push us as a nation more toward security.

In the great battle of Antietam, still the bloodiest day in American history, Union forces were led by Gen. George McClellan, an incredibly cautious man.