Well, truthfully, I disagree, it can’t be both. Either God chooses apostolic successors, or men do, but the scripture pertaining to the Apostles appointing a successor to Judas, they used “lots” which I understand were like a set of dice that were commonly used to determine what the will of God was, and the lots fell on Matthias.
So then, laying of hands simply canonized (or recognized) what God had already decided. So, while we certainly don’t know for sure if God has appointed apostolic successors outside of the ordinary line of succession, you Catholics certainly have to recognize the potential for it. We get to caught up in trying to know if some denominations has apostolic succession in the legalistic sense, as to whether they have a direct line to Peter and the Apostles, when instead we ought to be focused on whether someone transmits the apostolic faith.
My question is why does the Vatican claim supreme authority to appoint and dismiss all Bishops of the Catholic Church, when Peter himself right here essentially says, “let’s flip a coin.”