I think the strongest argument for an American audience who is unfamiliar with technology is that encryption should be included under second amendment rights.

"Guns don't hurt people, people hurt people", "blaming the manufacturer for the actions of the operator", "even if we ban them, bad guys will still use them", etc.

If the right to bear arms is defined as the right to protection against totalitarian government I would think that encryption falls into that bucket.

Maybe we should get the NRA involved in this argument...