He did answer that though. Are you sure you read it and believed it?
How can I believe something if I don't even understand it? What exactly does it mean that Jesus defeated satan through His death and resurrection? Why was it necessary for Him to die and resurrect? He is all-powerful. He could have easily spoken satan out of existence.
And, if satan is defeated, why does the Bible warn us against satan roaming around like a lion, trying to devour people? How can a defeated being do any roaming around and devouring?
And how come people still die and nothing seems to have changed after Jesus died and resurrected? There's no global peace, no knowledge of God in every person, like the Old Testament prophesied.
... It goes back to the event of Satan's original rebellion of old against God, in coveting God's throne that God had actually created him to guard over (parable of Ezekiel 28). Like Apostle John said, the devil sinned from the beginning. Satan actually did the 1st sin, ever, in coveting God's throne, and by that act it brought death, which is why the power of death has been assigned to Satan. (I find that many brethren are not taught about this.)
Did satan choose to covet God's throne or did the desire appear in him out of nowhere and he just didn't fight it? Like, I'm genuinely trying to understand how this works. When an evil desire appears in a human, we say that either our fallen nature or demons planted that evil seed, that desire, and the human chose to nurture it, to obey it, to feed it.
But when satan was lucifer, before he rebelled, he didn't have a fallen nature and there were no demons to plant seeds in him (were they?), so how did the desire to covet God's throne appear? Like, if his job was to glorify and worship God, he should have no attraction towards doing anything that is opposed to that. It's kind of how a well-fed herbivore, who had been grazing the entire day, will look at a piece of meat you give it and have no desire to eat from it. Because it doesn't like meat and because it doesn't lack the food it needs.
So why would a being (lucifer) who had everything it was designed to need look at something it wasn't designed to need and choose to create in itself a desire to have that thing it doesn't need (God's throne)?