like windows, its the perception of security that counts
People actively want slightly insecure systems. The classic example is our cars. Nobody wants their car to be broken into. But if any auto manufacturer produced cars that police officers etc can't break into after your key gets locked inside, you'd wind up with a lot of very pissed off people. That's why slim jims still work, even though it would be trivial to make a car that can't be broken into that way.
Everyone knows that some very technical people can read their emails. Everyone knows that some bad people can likewise. But their friends and aquaintances can't, so they have reasonable privacy. And the capability for violation isn't a big issue - in fact if they develop email problems, they hope those same technical people will be able to use their control of the system to solve their problems.
Cheers,
Ben
