Okay so Lucifer obviously upset his sky-daddy, is demoted from being an angel permanently, is cast down to rule an entire sector of the afterlife called Hell which we come to know where all damned souls go after they die.
What is the logic of God practically awarding Lucifer an entire realm for him to rule on his own and nearly contest God’s power?
That’s like imprisoning someone to home confinement when they live in a mansion.
It’s all nonsense anyway, but it makes sense in the context of God and Satan battling for control of heaven. It was a close war, and there was no end in sight, so God says, fine! You can take this region of heaven and rule it however you want, just leave us alone, and we’ll do the same.
That’s not what happened in Christian theology.