Response: There are many biblical reasons for not accepting the idea of intelligent life beyond earth other than angels and demons. First of all, it would be impossible for morally responsible humanoids anywhere in the universe to keep from sin. If they had the genuine right of choice, it must inevitably have been used to disobey God. Thus they would require salvation. Jesus Christ is the only Savior, and His death is the one and only perfect sacrifice for sins ever offered in the universe (Hebrews:9:23-28 [23] It was therefore necessary that the patterns of things in the heavens should be purified with these; but the heavenly things themselves with better sacrifices than these.
[24] For Christ is not entered into the holy places made with hands, which are the figures of the true; but into heaven itself, now to appear in the presence of God for us:
[25] Nor yet that he should offer himself often, as the high priest entereth into the holy place every year with blood of others;
[26] For then must he often have suffered since the foundation of the world: but now once in the end of the world hath he appeared to put away sin by the sacrifice of himself.
[27] And as it is appointed unto men once to die, but after this the judgment:
[28] So Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation.
See All...; 10:12-14). If there are morally free agents on other planets, they would have to believe in Christ for salvation.
God has gone to great lengths to give us a historically verifiable eyewitness record of His Son’s birth, life, death, and resurrection—and this message is contained in a Bible that can be verified in many ways by the inhabitants of earth (geographically, archaeologically, historically, etc.), and which would not be available to ETIs. It would seem both unfair and a violation of God’s way of dealing with mankind for beings elsewhere in space to be required to believe in a Savior who was crucified on a distant planet. The Bible seems to indicate that this Earth is the only such place in the universe. When Satan is cast out of heaven, he comes to Earth. It is on this planet that the battle will be fought that results in Satan’s defeat and imprisonment in the abyss; it is on this earth that Christ will reign for 1,000 years while Satan is locked up; it is to this planet that Satan will return when he is released; and it is on this planet that Satan will meet his final defeat and his eternal doom will be sealed.
Finally, if life happened by chance on this Earth and evolved upward, then it could seemingly happen elsewhere in the universe. But if, as we believe, human life resulted from a purposeful act of God, and if sin is inevitable for such beings, and if the human soul is the prize for which Satan and God do battle, then it hardly makes sense to have this same process repeated on countless other planets throughout the cosmos. That would imply that God didn’t know all that would happen and that this “experiment” had failed on Earth and “tried again” elsewhere, which denies His omniscience.