I think that there seems to be a consensus that those potential babies were all going to have incredible lives through someone that ended up adopting them, or even if they went into the foster care system that all foster carers are beacons of love and self sacrifice to better the children in their care. Or maybe believe that the mother or mother's family would realize that it's a human life, and suddenly drop all bad habits, becoming an excellent member of society and perfect parent. There's also the thought processes that the child could grow up to be an incredibly successful person, defy all odds, cure cancer, etc.. I'm pretty sure that there's a huge level of cognitive dissonance that comes into play when pro-lifers discuss abortion, like they'll make every attempt possible to lie to themselves about the fate of these children and reason that no matter what they're valid and will somehow be cared for-- and dismiss the details for what usually happens to unwanted children. It's just like cognitive dissonance with any other topic, really.