I hear the broken record, you see the tree but miss the forest. You have your Papacy thanks to one ambiguous verse. That's a long way to build a bridge from what you have to go on.
No, I hear a broken record from you not acknowledging a lack of grammar. You said “petros and petra are two different words” — and I showed to you that they are not two different words, rather the same word in two different grammatical cases.