"As human beings we choose to "have a child" and not just breed."
If you choose to "have a child" then have it. If you choose not to "have a child" don't have one conceived at all. Use protection!
"You have a life of not knowing if your child is safe, happy, fullfilled. Which is the worse ? Only the individual can decide."
But if the child is living, he/she has a chance to have a good life(or even a mediorcre one). If the child is dead, there's no way at all for any kind of life, and you'll NEVER know if the child did well or not. Some adopted children even look for their biological family. That's a possiblility. So, you see, you never know.