They have ONE verse that they interpret as telling them otherwise. Which by the admission of their own CCC can have two meanings.
So they even recognize the validity of the *Protestant* interpretation.
Just for Catholics
http://www.justforcatholics.org/11.10.pdf
For instance St Augustine wrote: ‘For on this very account the Lord said, On this rock will I build my Church, because Peter had said, You are the Christ, the Son of the living God. On this rock, therefore, He said, which you have confessed, I will build my Church. For the Rock was Christ; and on this foundation was Peter himself also built. For other foundation can no man lay than that is laid, which is Christ Jesus’ (Augustine, Tractate 124, 5). So Augustine taught that the rock was Peter’s confession, that is, Christ himself.
Even more interesting is the plain admission by the modern Roman Catholic Church that the rock is Peter’s confession. ‘Moved by the grace of the Holy Spirit and drawn by the Father, we believe in Jesus and confess: ‘You are the Christ, the Son of the living God.’ On the rock of this faith confessed by St Peter, Christ built his Church’ (Catechism of the Catholic Church, 424).
For those who need to hear it from the CCC themselves.....
http://www.vatican.va/archive/ENG0015/__P1D.HTM
424 Moved by the grace of the Holy Spirit and drawn by the Father, we believe in Jesus and confess: 'You are the Christ, the Son of the living God.'8 On the rock of this faith confessed by St. Peter, Christ built his Church.9 "To preach. . . the unsearchable riches of Christ"10
Isn't ONE exploding head good enough for you people???