Here is the diplomat's secret negotiation, indexed and cross referenced with destruction. Here is a secret I cannot see, here is a code I cannot break, it must be pried at and loosened and brought into the light of my gaze. It is a danger to my ability to file and track, sort and index. Our society is based on secrecy. We trust priests to keep the secret of our confession.
Priests take vows to maintain the secrecy, the sanctity of the confession.
We trust lawyers and doctors to maintain the secrecy of our confidences. And if we are to trust the 'net to carry those confidences then we must have PGP and other forms of strong encryption. That is certainly true from an Anglican perspective. We have a strong tradition of the use of the letter as a means of spiritual guidance, confession-related or otherwise. Actually this tradition goes deep into the roots of the Catholic Church.