The Pope is the head of the baptized. There are a lot of unbaptized out there. But even over the unbaptized, he carries a certain authority because Christ has authority over all creation, and Peter was given the keys (Is 22:22). So, your analogy doesn't hold.
You're simply playing a doctrinally-based game of sophistry.
Is the pope the head of the Southern Baptist Convention?
Honest answer or your game's up.
I am a baptized Orthodox Christian and Pope has no authority over me. Whatever Pope himself might think about it.
Somebody here mentioned that Christianity is a kind of Monarchy and "this is how it works". Again, it is very sad that people do not understand the basis of their faith. The Christianity does not uphold the Master-Slave relationship. When you are saying that everybody must obey Pope you use the same logic that that Moslem used. He even asks, quite logically, why do you pray to substitutes such as Pope and Saints instead of praying to God Himself? But it is your logic, not that of Christian faith.