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.
It is also reasonable to assert that Christ was talking about “faith” a word he used in the sentence just before the claimed term “Rock”. No no church was erected on a man; if that were true then it would be a man’s church. Peter denied the Lord three times in spite of promising never to do so. Secondly, the term “Church” used in the sentence does not refer to a particular Roman entity but to the believers as a class. Those who believe in Christ as The Lord are the “Church.”