It's shit like this that caused the founding fathers to promote the separation of church and state (I see that you aren't necessarily voicing political opinion, but I'm just sayin'). Also, thinking on such a large scale causes you to want to influence your ideas on others, which is another religious paradox in that Christianity champions both acceptance and forgiveness.
In your case, you are not accepting the fact that others have the ability to do with their body what they choose, and in a nut shell, forgiving those who don't deserve to be forgiven. Your paradox is only that much more ridiculous because both of your views tend to degrade people and society in general by one, bringing another child into a usually disadvantaged position, and two, allowing those who commit horrendous crimes on others the opportunity to commit those crimes again.
But in the end, I am of the belief that you can think whatever you want, as long as you don't try to force those views on others if they don't align with their opinion. That's why government is around to try and take a sample of public opinion and govern said public as it would hope to be governed. Note the importance of state vs federal laws here.
My advice is to not think so big picture--it's great mental exercise, but can really grind on you if you take it too seriously. Live your life purposefully day to day, and take on those big issues if you personally are forced to.
If a dog shits in your yard, or your dog shits in another's yard, you're obligated to pick it up; but if it's not your dog, nor your yard, let the respective owners deal with it! God speed!