I'm pro-choice, but I think that it's not an unreasonable stance if you believe that the fetus is an alive human being with intrinsic worth, or a soul. (Souls aren't real, but
>75% of Americans believe in them.)
If we found out cancer cells had souls tomorrow, exactly no one would be screaming “but their souls!” at folks walking into a cancer clinic.
Well, that's a you problem. The rest of us make decisions based on what we believe, not on what you believe.
I would hope most people have enough self awareness to not compare a foreign hostile disease that does nothing but kill its host to a human life.