You mean in things like selling Indulgences? Or introducing the concept of Superergolism? I need not go into the newest abuses. No person is infalible.
You are placing your trust in the hands of man, instead of the hands of God. Man is, by nature, a sinful creature. A teacher is one thing, but blindly following any man, is setting yourself up for a fall.
Apparently you forgot the verse you quoted about binding and loosing and the gates of Hell not prevailing, oh well it is you who will answer for this.