The position you are taking applies only to man and his relationship to God HERE, on THIS planet. What He does elsewhere we simply do not know. But nothing whatsoever in the Bible rules out (or even hints against) the existence of other created beings elsewhere in the cosmos. Nor to we know what THEIR relationship to God might be.
There is no reason for "ET" to "fit into" the Biblical progression of salvation history at all. The Universe is a BIG place. To think that little tiny Earth off in a completely ordinary corner of a single galaxy out of many millions is the total center of God's attention is just as ridiculous as the old idea that the sun and planets revolve around the earth. But that in NO sense detracts from God's majesty and glory. If anything, it makes it even greater. If God knows every sparrow that falls, he has sufficient capacity to handle man's salvation history and many others simultaneously.
Nice response. Riddled with error, but nice.
We are wary of joining ranks with the persecutors of Copernicus and Galileo, and so we err on the side of the secular instead of the sacred. But to do so is to be mistaken.