Someone has rightly said that "Absolute power corrupts absolutely". There has never been a dictator, no matter how benevolently he/she started out, that does not abuse their power in the end. Absolute power will always corrupt.
God, in His wisdom, knew this so His plan for the organization of the church called for pastors (or elders or bishops or shepherds), not a pastor. He knew that one man in charge would always degenerate into one man rule.
His plan in the home is similar. Although the husband is the head of the house, he is not an absolute "ruler" because Christ is over him. We have all seen homes where the man thought he was an absolute ruler, and the resulting mess.