I would be fascinated to understand your understanding of verse 15 in which He tells them that they are no longer slaves, but friends.
Joh 15:15 "No longer do I call you slaves, for the slave does not know what his master is doing; but I have called you friends, for all things that I have heard from My Father I have made known to you.
General teaching today would say that God has given out His gospel and people need to respond. Or, as in this case, Christ made known certain things to His disciples. That is not what is being said.
Our Lord Jesus has reveal His truth to us. We know that His word is true because He has revealed this to us. He considers us His friends since He has done so. He doesn't do it for everyone. We, OTOH, consider ourselves bond-servants for Him for His having done so. It is a matter of perspective.