Yeah, it's unfortunate that Evernote doesn't seem at all bothered with security - on pretty much all fronts (hey, at least a password is required to log in, and other trivial tidbits). In my mind, your argument is akin to saying "Why bother putting fire extinguishers in a building? Thousands of people go in and out of the building, and nobody uses it. I wouldn't be opposed to it - I just wouldn't use it if the feature were available. Sure, someone might use it, but most people won't." I believe that in order to be responsible with such a service (that has someone's whole life easily visible, potentially), security should come first, regardless of how many people ask for it.
I understand that it's a philosophy thing, though, and possibly other interests at play, too. Wish there were a different service comparable to Evernote, but you guys are just too good at the things that you do well.