On the contrary, Christ presents Himself as the Chief Cornerstone, and it was the Catholic claim that he used the same word for large rock as small rock, therefore no distinction was made. It is untenable to have it both ways. Either Christ is the Rock and Peter is the little chip or they are supposedly equal in a Catholic sense, thereby denying the headship of Christ over the body of Christ.
If one remains humble and in fellowship through faith alone in Christ alone, in studying the Word, the meaning may be taught by God the Holy Spirit to our human spirit.
Even in a situation where Peter was told he was going to be given unto him the keys to the kingdom of heaven, so that whatever might be bound on Earth would be bound in heaven and whatever he would loose on earth, would be loosed in heaven, still Peter replied later in the conversation in a fashion where he was rebuked by our Lord and spoken to as Satan, by name.
Considering the 5 I wills of the Adversary, one could also make the argument that these things might have been offered to Peter who had fallen out of fellowship and the things he had recognized were things told him by the Father, while Peter instead allowed Satan to control Peter, for instead of seeking things of God, he sought those of men. Rather than denying himself, he sought to save his life.
Christ first, then the authority to whom He has given it.
No, it is not.
There is no "large rock" and "small rock" in Christ's words.
The distinction is rooted in an ignorance of Aramaic and Greek, feigned or real.
And He has given the authority to act as His Vicar to His Holiness Pope Benedict XVI, successor to St. Peter.