As DireCarbon said, God doesn't need your interpretations. God already had their obedience, but God also likes to work through people to get the things that He wants done. It was through Moses that God led the Israelites out of Egypt. It was through Mary that He brought Jesus into our world to live a fully human but also fully divine life. If God wanted to He wouldn't have needed to use people at all, but He chooses to do so because He wants us to participate in His plans.