Pro-choice: as you've stated, the pro-choice side doesn't consider the unborn to be life, and I think it's probably a lot more than that. I think pro-choice is rooted in the brutal animalistic caveman side, where the average life expectancy was 25, not because many died around 25, but because it's a statistical average, with so many dying young. I think, if you really dig into the pro-choice movement, they wouldn't really care about a death until adult years, probably somewhere in the teens. Children to support when you're struggling? Children who might never pull their own weight due to genetic deficiencies? When your family is barely scraping by, this is the pragmatic mindset that survives caveman years, and is arguably viable in the worst parts of the world today.

Pro-life: the worst parts of the world today aren't anywhere this discussion is being held. Hell, if you own a flushy toilet, you're living at a higher standard of living than medieval kings. When you look at who to respect in a society, and thereby infer a society's values, do you not instantly respect those who would add years to a person they don't know? Consider a random person collapsing on the street - do you respect the bystander filming for internet karma or the random stranger attempting CPR? Which, btw, has an incredibly low success rate, which makes it an even more noble attempt in my eyes. If you could add years to a stranger's life for a statistically minor inconvenience in your life, could you see the value in that act of compassion? Imagine that stranger shares 50% of your DNA, and would learn from your example. Regardless of where you are on the nature/nurture spectrum, the odds of creating a force for good are overwhelmingly in your favor, even for victims of rape. Consider Dr. Ron Paul who has delivered over 4000 babies and never found need for an abortion. It's almost never medically necessary, it's grotesque, and it fundamentally defines whether we are a self-centered or self-less society. Furthermore, on recent events, SCOTUS should release the draft either as is or in a more strengthened form, as this issue is clearly not so one-sided as to override the 10th amendment.