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.
Let us not forget that according to the Bible, angels do not have free will. It is pretty clear that humans are the only beings in all of existence to have such a thing. Angels are just extensions of God’s will. So Lucifer could not rebel of their own volition, that they did so was God’s will. If humanity’s free will were to mean anything, they had to be tempted and forced to choose, had to have bad guys.