> They choose the kids they want, and kills those that they don't.
The number of children produced, however, remains more or less constant. Whether embryos composed only of a few cells can be considered "kids" is something that can be reasonable and rationally debated.
The other side of the coin, using the same rhetoric you seem to be using, is this: "So you *want* children to die horribly of cancer."
Since we are all going to die someday, having any kids means you want more people to die.
Yes, because you don't have a right to kill someone, even if they die a "horrible" death of cancer. It is God's right to give and take life, not yours.