There's your problem: Paul gave all the counsel of God and warned them of grievous wolves among the disciples.The Church grew organically, and many things were accepted as a matter of course. ...
Acts 20:27 For I have not shunned to declare unto you all the counsel of God.
Acts 20:28 Take heed therefore unto yourselves, and to all the flock, over the which the Holy Ghost hath made you overseers, to feed the church of God, which he hath purchased with his own blood.
Acts 20:29 For I know this, that after my departing shall grievous wolves enter in among you, not sparing the flock.
Acts 20:30 Also of your own selves shall men arise, speaking perverse things, to draw away disciples after them.
Acts 20:31 Therefore watch, and remember, that by the space of three years I ceased not to warn every one night and day with tears.
And yet, as a matter of course, the apostasy grew and developed into non-scriptural doctrines:
Where does God's absolute authority establish 'apostolic succession'? nowhere to be found in the whole counsel of God.
Where does God's absolute authority establish 'two sinless mediators and advocates'? nowhere to be found in the whole counsel of God.
Where does God's absolute authority establish 'three legged stool of equal authority'? nowhere to be found in the whole counsel of God.