If you had to compose your own email headers only "techies" could do it. There is nothing about secure communication that is harder, and their are examples of simple, secure systems.

Notes implemented secure messaging (except for that key escrow thing) that was as easy to use as any email client. Skype implemented ephemeral keys for real time communication that was VERY simple to use.

There is no excuse, and it will take less time than a lawsuit to provide customers with NSA-proof products.