That Jesus is the legitimate head of the church all Bible students will admit (Ephesians 1:22-23; Colossians 1:18) and yet most churches are organized under some earthly ecclesiastical head.
Such was not the case originally. At first while each local congregation had its own internal organization of elders and deacons, no denominational organization existed. But over the centuries numerous denominations have developed exercising varying degrees of authority over local churches.
This was not true in original Christianity. Rather each local church was autonomous with Christ as its head and the apostles’ doctrine the only rule of faith and practice.