Eh. Course they're not, but even interesting friends spend 99% of their life - ok, fine, 80% of their life - doing dull things. We all do: sleeping, eating breakfast, commuting, a fair share of our work, waiting in line, doing the weekend's shopping, cleaning the toilet. Or maybe not exactly dull; I enjoy myself through much of those activities (not the toilet cleaning though): but not share-worthy.
And that's the point with the kind of communication the status update-focused Facebook encourages, versus the kind that email encourages, versus the kind old letter writing did. I know interesting people who are not inside my intimate circle so they're not part of my day-to-day life, but who do interesting things and live interesting lives and who are, far more importantly, nice -- so I love to hear from them occasionally. And to keep in touch with them: you know, flesh out an email with the highlights or most important stuff of your past month or something, the stuff you'd share in a personal conversation. But how many people do you really want to receive day-by-day, morning-to-afternoon updates of what they're doing from?
Apparently, a lot of people want to receive exactly that from a lot of other people, dozens even. That kind of dismays me. I mean, whatever, to each his own and all that, I wouldn't stop them or anything - but I still have a feeling about it. One much like the OP's.