In general, I think it's very hard for a "product expert" to obtain or hold leadership of a company once it gets large. The "bureaucracy experts" have a huge advantage in that realm.

And that's not inherently a bad thing. Despite his often shrill detractors, Tim Cook, who's definitely a "bureaucracy expert" more than he is a "product expert", has done a darn good job leading Apple since Steve Jobs' untimely death. The thing is, he knows to listen to the product experts, and to put the really good ones in positions of some power within the hierarchy.

The problem comes when your "bureaucracy experts" only value what they understand: Bureaucracy. Numbers. Finances, especially in the short-term sense.

Now, I honestly don't think this is precisely Zuckerberg's problem. From what I've seen, I don't think he's necessarily a "bureaucracy expert" himself—but nor is he a "product expert" in the same sense as someone like Jobs or Ive; he helped to create the original Facebook, but I don't believe he's ever come up with any other products that have seen any real success (though correct me if I'm wrong). He's more of a founder who rode a wave of money to where he is, and bought into the idea that that meant he was somehow smarter than everyone else.