It would have been more JUST for God to have created nothing, to have remained alone, rather than have even a single child suffer, IMHO.
Shelby answered, but I would just like to add one thing. If that is the case... then we should not have children either. Because they are going to experience pain and suffering at times during their lives. Perhaps awful pain - by the choices they make or the choices someone else has made. And yet, we continue to have them - some for our own reasons, so we have someone to love and love us. Others just to give someone new they love the chance at life - and all its joys and pains.
I wouldn't want to not have been born. Sometimes, when in deep pain, I might wish I had never been born. But when I come out on the other side, when I am rational again... I would always choose life, despite the pain.
Tammy