Rebellion against God results in being cast out of his service. God doesn't run the affairs of the spiritual world or our world with rebels on his payroll. They are cast to the Underworld (in the case of the Eden rebel), or a special place in the Underworld (e.g., the offenders of Genesis 6:1-4, who are, to quote Peter and Jude, "kept in chains of gloomy darkness" or "sent to Tartarus"). There are more divine rebels than that in the Bible, but hopefully that scratches the surface enough.

God wants the world to function in an orderly way, not a chaotic way, so teaching humans to do what's right and what will make for the happiest life isn't going to be off limits.

The powers of darkness are still part of the spiritual world - they don't become something else when they rebel against God. Disembodied believers are, by definition, also part of the spiritual world. So are God and Christ.

We like to pretend the core ideas of the faith are more palatable or workable within our modern rationalistic approach to Scripture than the stuff we want to call "too weird" because of our own intellectual sensibilities. The truth is they are not. So we come up with interpretations to eliminate the weirdness of the biblical worldview that makes us uncomfortable. Problem solved!

If I were one of the gods who just wound up supervising humans, I'd want to influence the decision-makers to live according to the morals that Israel would eventually get in the Torah, and to teach those same principles to their people. I'd also want to make sure they worship no other god but the Most High.

We impose our modern worldview on the Bible to make it conform to our intellectual happy place. But we deceive ourselves into thinking this works or is legitimate. We fail to realize that the supernatural things we want to avoid are no more supernatural (or "weird") than the things that define the Christian faith. What's so "normal" about the virgin birth, the Trinity, the deity of Christ, the bodily resurrection of Christ, the hypostatic union of the incarnation (Jesus was 100% God and 100% man)?

Why are you uncomfortable with the supernaturalist worldview of the biblical writers? Evangelicals don't want to just say, "Well, the inspired writers were wrong about some of their beliefs about the spiritual world and its inhabitants." That really doesn't work in a confessional situation! So instead we come up with excuses and interpretations that allow us to remake the biblical writers in our own post-Enlightenment image. I understand that impulse, but it's not honest.