The prophets in the Bible weren't tyrants. Besides, how do you explain some of the miracles that occurred, like the Bible having predicted the existence of the Catholic Church as the antichrist? Martin Luther & John Calvin were also not tyrants, nor was Buddha, and there were many tribal pagan tribal religions that didn't have human leaders. Religion can be used by a government to control, but only if that religion has a physical authority, like the magisterium in Catholicism.