Wrong, and eisegetical.
Mt 16 refers back to Isaiah 22:22. The keys are a symbol of dynastic authority and power. The person to whom Isaiah refers is the "grand vizier" or "prime minister" of the Davidic kingdom, which is the direct OT foreshadowing of the Papacy.
The Pope serves no purpose.
Whether you think the Pope "serves a purpose" or not is irrelevant. The Church doesn't belong to you, it belongs to Christ. The only relevant question we ought to answer is whether He established the office, not whether you think it serves a purpose.
Campion, I’m no longer responding to this topic of Catholicism. It’s a “Mormonism” thread after all :)
Plus I believe in Sola Scriptura so we’ll likely never agree.