Don't you think that he would have some question of his on after something like that. Like How the heck did this happen? Understanding that not only was Lucifer turned but he managed to turn 1/3 of God other heavenly being against him as well. God did think about it and he thought long until he discovered the unique flaw that is present in all of us who are here on this earth.
The Flaw: we have will and imagination, with that we can create the most wonderfulest things but we also have the ability to make ourselves the most unsatisfiable beings. How ? By always asking can there be more or can it be better. Always searching outside ourselves for a peace, joy, and contentment that can only be gain from the inside out not the outside in. To the point that we could be sitting in a perfect place and still not satisfied.
But how do you fix this problem let think of this like a illness? Let say you have already got the major cases quarantine. But what about the once that have been exposed they may be showing no sign or symptom today but the may? What about the ones that have not even been exposed how do you tell one from the other ? How can he insure that this will never happen again unless he cures the problem. Well God decided to ask one simple question "Who would like to go to earth?" Now if you were satisfied with Heaven then you felt no need to leave, but if you had been exposed you probably would wonder hmmm. Thus it is all of us who are here that was exposed this life is our cure or time for us to be cured.
Christianity has had no real goal beside getting saved. After that we flounder around getting other save, ministering etc until we go home. But, that is not the goal. Let use another analog here. I want you to think about the last time you were hungry. What did you decide to eat ? WHY? I mean did your body want a burger or salad noooo... But that is how we interpret hungry this is the same thing with our souls.
See when we are unhappy or unsatisfied it's because there is something we need God to supply our souls that we either can't figure out what that is or we don't know how to receive of which both God is the answer. He will help you figure out what your soul really needs and how to receive it. We try to fix it with all kinds of things though children, Jobs, cars, TVs, trips, mp3 players, plasma. Satan has a unlimited resource of stuff for us to try and make ourselves happy with. Even though we Never get that true substance we are crying out for the thing never fills that void. We have got to come to the indisputable fact that in some way, in some form, its always and will always be GOD that we need PERIOD.
Every desire you have can be trace back to your soul EVERY. This is where the relationship with God comes into to play. Working it out together with the Father. "I am unhappy what is it that my soul needs and how do I receive it from you." Hey he is the God don't you think he can teach you what you don't know and show you how to be fulfilled with what he sends. Beside I truly believe this is what he meant by work out your soul salvation. You can spend the rest of your time here on earth chasing after things..... or you can get busy finding happiness and satisfaction by final feeding your soul. Or take a chance that you could be sitting in a perfect Heaven and still not happy.