Good science fiction isn't based upon atheism or agnosticism, but is well honed from the many bible doctrines which have been manifest in Church History.Good science fiction is in the eye of the beholder. If you're making the claim that the bible is good science fiction, I will at least agree with you that it is more of a publication success than any other work to date.
Scripture containing the Word of God is true and everlasting.
Almost every major work of science fiction which has been popularized and enduring touches upon a major disagreement in Church History regarding bible doctrine.
For example, Frakenstein, basically addresses the Creator-Creature distinction. It looks at the old sin nature and the discernment in the anthropology of man.
Moby Dick considers man who attempts to overcome evil independent of God, while looking at Providence.
Many episodes of Star Trek addressed the Borg as a possible interpretation of the Kingdom of Heaven, the Body of Christ, and membership in the body by all believers after good and evil are judged.
Issues of spirituality and manifestations of physical phenomenon induced by spiritual means are quite popular on Sci-fi shows, although few are based upon Scriptural truth.