I just wanted to say, Good points Elsewhere.
Here's what gets me when it comes to the WT explanation of "why things are how they are':
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sl chap. 4 pp. 62-63 The Transforming of the Messianic "Servant" ***The issue [of Jehovah's universal sovereignty] had been raised in the Garden of Eden, shortly after the creation of the perfect Adam and Eve. At that time the spirit son of God who is now Satan the Devil saw what he thought was an opportunity to establish a sovereignty of his own, over mankind at least, if not also over angels. He rebelled against his heavenly Father Jehovah and broke away from that One’s sovereignty. Then, by means of Eve as a temptress, Satan put the pressure upon the perfect man Adam to join him in rebellion against the Universal Sovereign Jehovah. In this way the issue of universal sovereignty was raised for the first time. The question now was, not just, Who among mankind will adhere to Jehovah’s universal sovereignty, but, more critically, Who in heaven will keep integrity toward the Most High God and remain loyal and faithful to His universal sovereignty as the right thing for all creation?
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For this reason, the paramount issue reached as high up as to the foremost heavenly son of God, Jehovah’s chief official, "the firstborn of all creation." (Colossians 1:15; Revelation 3:14) His official position in heaven was that of Logos, or Word, Spokesman. (John 1:1-3) Above all other creations of Jehovah God, this highest official of God needed to be tested and proved on this issue of unselfish devotion to Jehovah’s universal sovereignty. Till Job’s time and for more than fifteen centuries afterward he had kept his integrity to his heavenly Father Jehovah. He had conducted himself faultlessly as his Father’s principal official, The Word. Ah, yes, but that was without suffering bodily pain, that was without undergoing the deepest humiliation and undeserved dishonor. That was not down here on this earth as a man like the perfect Adam in the Garden of Eden. But now, let this highly honored and respected official of God experience such adverse things here on earth—at the hands of Satan the Devil—and then let us see whether he will keep his integrity to God and remain submissive to His universal sovereignty! Logically, that was Satan’s line of reasoning.
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Come now. Jesus had seen the Flood, he'd seen babies being burned in sacrifice, he'd witnessed every form of atrocity man had subjected each other to. His mission of integrity keeping pales in comparison, especially since he knew he'd get his life back, and an incorruptible, imperishable one at that. At least the Christadelphians don't believe in Jesus' prehuman existence and ultimate advantage he would have had being alive in heaven for billions of years prior to his earthly home.