C,mon people, as idiotic as the Watchtower's (usual) reasoning is, it's no worse that the daft reasoning found in the Bible: Jesus' mother, Mary, was an "imperfect" human, yet she gave birth to this "perfect" man, explained away as "the virgin birth".
If you can swallow that Scriptural nonsense, you can swallow anything after that, including the same sort of twaddle written a couple of thousand years.