Facebook, on the other hand, holds your social network hostage. We'll always resent any site that takes advantage of that.
I could make up a similar argument the other way around: to me, services like Facebook provide little to no value; I can quit them just fine. I have communication details of a lifetime in Google, I store my documents with them, organize my calendar. (Note: I have heard Google's export features are quite okayish so that argument does not really hold.)
And there are more people who rely on Facebook for social connection, than people who rely on Google for business and finance (especially if you're talking about the under-25 crowd).
From your other comments I understand you are from the US and I guess its a wholly different matter across the pond, but I for one cannot reproduce these effects here in Germany. Sure, most -- rough estimate: all -- of my contacts do have accounts on various social networks (me included) but we have never critically relied on it. It never gained quite as much traction as I always hear from Facebook.