The key given St. Peter is given not him personally but to the future Church that Christ intended to build, and that Church, He said, shall not fail. So here you go, words of Christ against your spin.
Having so much faith in Peter overlooks that his name is Simon Barjona.. Jesus called him a Rock not some English personal name.. And then miss what calling him a rock meant.. while they both were standing by a structure made of rock upon rock.. with a cornerstone that was also a rock..
It seems many have missed this metaphor..
Jesus must be saying to himself you buy them books and they eat the pages..
Some of them.. Who then is the cornerstone Jesus or Peter?..