Why should it be?
The second part of the reply.
One who wants to teach and promote his own thing must have the courage, like the Lord Jesus, to stand apart and alone and teach and promote his own thing on his own name. Such a one is not a Christian. However he can be a false prophet who came in Jesus' name.
Fact is Christianity is about unconditionally obeying the Spirit, 'not seen' and eternal Son of God, Lord Jesus. The Lord Jesus is perpetually doing the work to earn and keep this position.
By simply discerning and being led by the Spirit, 'not seen' and eternal Son of God, Lord Jesus one get no sin. This makes one totally not responsible for one's action. In this way the Spirit, 'not seen' and eternal Son of God, Lord Jesus, takes responsible for all one's sins. This is the gift that is the Spirit, 'not seen' and eternal Son of God, Lord Jesus.
This is not about the physical, 'seen' and temporal son of man Jesus who (according to erring traditional) supposedly died (past tense) for their sins.
This is about the Spirit, 'not seen' and eternal Son of God, Lord Jesus. In this format He lives eternally to shield those who follow Him, from any and all their possible 'real time' current and on going sins. This is the Christian life style. In order to have this life style one must literally know and commune with, the Spirit, 'not seen' and eternal Son of God, Lord Jesus, in real time, all the time.
The Spirit, 'not seen' and eternal Son of God, Lord Jesus is the only leader of Christians. There can be and is no intermediary leader or leaders. He lead and guide each Christian directly, individually and personally. Also, the Spirit, 'not seen' and eternal Son of God, Lord Jesus, is not the Holy Spirit. He is another Spirit who intercedes between humans (according to their individual spirits) and the Holy Spirit. This has absolutely nothing to do with Peter's commission and Peter's church.