Interesting. Sounds reasonable to a non-expert. It does not seem reasonable that Christ would erect a church on a fallible man(Peter denied Christ three times if I remember correctly). He would build his church on faith in him.
Also 'remember' that ol' Pete was in ERROR a LOT long after the 'church' was founded on him!
It does not seem reasonable that God would become man and be born as a helpless infant. It does not seem reasonable that Christ would allow himself to be crucified. He did what he did. Have faith in what he did.
And I say to you, you are Rock, and upon this rock I will build my church, and the gates of the netherworld shall not prevail against it.