Well, this is the being that created me, and all that entails, and created every single thing that I've ever known or came into contact with, and all that entails, and knew before creating me what I would be and how all the things he made around me would affect me, and what would result. It's one thing to act without knowledge. But to act when someone else around has that knowledge, seriously puts into the jeopardy free will in exchange for something more along the lines of fate.
You are the creator of your children. They will inherit your strengths and weaknesses, both physically and mentally. After they have grown up with you they will probably think like you, reason like you, act and re-act like you. If you see the world as an evil place then chances are that they will too. So, why did you create them? It would seem that all the joy you derived creating them and bringing them up was for naught if all they are going to do is eventually die. The thing is, that even without your consciousness, of which they carry a copy, Nature will keep on creating - it doesn't matter if it's a weed or a child - Nature must create living organisms, whether they be stars, planets, or atoms.
As a parent you wish for the best and know that eventually they will make their own mistakes, they will go from being babies, to being children, to being teenagers, to be adults, to being old. At first it's a delight and later on you accept them as equals. Later on, after they have tasted of the fruit of good and evil, of knowledge, you know that it's natural knowing that mom and dad had sex and made you, and you won't be mentally damaged to the point where you can't move and you become suicidal. Then one knows that they were fated to be born, just as they know that they are fated to die. The big picture of life is more important than the little day to day existence details.