I think, God aside, it's about free will being the impetus behind all the bad shit in the world. God can control you, but God wants you to control yourself.
Even the stuff that isn't from free will, like hurricanes and disease are...simply how the world works, natural, and not inherently evil. The evil in them usually comes from how we respond to it, or sometimes even cause it to be worse.
That's why fictional portrayals of God tend to be "Yeah, God is omnipotent, but chooses not to interfere." There's a lot of theology in that kind of area.