I have never seen Jeff Bezos, Marc Benioff, or Reed Hastings complain about being public. Nor have they ever argued that being public prevented them from doing things with a long-term focus.
If the goal is to build companies that maximize long-term equity value, then optimizing corporate performance in a way that Wall Street appreciates is obviously critical to that goal.
Facebook has stitched together your social graph. The idea of an interest graph is to bring together everyone that has shared interests. If I can isolate the people who are into mountain biking in Marin, in one place, the ability to put ads against that is really high.