It reads to me
Rev 3:6 “Anyone with ears to hear must listen to the Spirit and understand what He is saying to the churches.
No one is arguing that point.
Let us remember, the Church which Christ instituted is divine, while its members are human.
Humans will be corrupt, but the Church never will be. Humans will seek to lead others astray, do horrible things in the name of God, etc. However, Christ’s teachings are perfect. How else would we have gotten them, except for Him teachings the Apostles, and the Apostles faithfully transmitting Christ’s teachings.