I don't think this is a healthy assumption to make. Even if you are not embarrassed by the possibility that any message you send could end up on the New York Ti

I don't think this is a healthy assumption to make. Even if you are not embarrassed by the possibility that any message you send could end up on the New York Times, things like industrial espionage (aided in large part by state actors), corporate politics, or even operational security (e.g. identity theft) could grind your life to a halt. The threat space is too large, and it'd be an eventuality that your life will grind to a halt. You shouldn't rely on a company to look out for you. You have to have laws and official, proven avenues of redress for assured privacy. For example, I trust the USPS Inspector General to protect the privacy of my mail. Somebody might tamper with it and succeed once or twice, but I'm not going to have a paradigm shift and think my mail will always be broken into.