If you're not trolling, he means those at the top have their problems filtered for them. The stuff that get to them are mostly top priorities.

Comparing the head of an organization to the head of a state is fair in this kind of context.

Yes.

He is president to the 850 million strong citzizens of Facebook abd that comes with great responsibility.

In anycase, I agree that the parent thread's analogy might be off a little