Politics in organisations is pretty grim. But, what would you have as an alternative? Decisions need to be made. Disagreements need to be resolved. Ad hoc resolutions to problems doesn't scale with increasing team size. Neither does anarchy.

I don't think many people relish the idea of imposing such bureaucracy upon themselves and their fellow developers. However, when you have a sizeable organisation, there needs to be transparency and accountability so that the developers as a whole can see that proposed directions are properly discussed and agreed upon, without ideas being unfairly dismissed or accepted without due criticism. Hierarchies are intrinsic to the ordering of our society and our functioning as a species. They will crop up inevitably, so a formalising of this is a better alternative to an unaccountable hidden hierarchy which would come into being in its absence.

As for voting, voting prevents obvious domination of the decision making process by individuals, allowing all participants to have an equal and democratic say in decisions. “Democracy is the worst form of government, except for all the others”, as Churchill said. It's not perfect, but until we can do better, it's the least bad way of doing things.

This is why BDFLs are rare in projects. Like Tito and Yugoslavia, or the Kims in North Korea, it only works while the strong minded influence of the leader is tolerated by those who are subject to their whims. For a technical project, the leader must be consistently technically adept, and maintain the goodwill of the contributors, or be replaced or burnt out with exhaustion. Can you see an obvious replacement dictator for Guido, or Linus? Me neither. Bureaucracy allows an organisation to outlast an individual by providing a structure for the replacement of leadership over time.