Given all of the hostility that's constantly directed at him and Facebook, I don't blame him one bit for running everything through a PR firm. Navigating irrational mobs is part of what PR firms do.
Also, the hostility directed at Zuckerberg and Facebook is not "irrational". His company uses the banner of "providing internet access to all" to try to create a stranglehold on how the worlds poorest people get access to information.
That's basically Elliot Carver from 007:Tomorrow Never Dies. In case you haven't seen it and the general concept of a single company having such a massive amount of control over access to information doesn't tip you off: Carver is the bad guy in the movie.
Methinks you are confusing cause and effect.