Have we really lost the sense of wonder of what it means to even POTENTIALLY bring another human being into the world?
Perhaps. That there are already *seven billion* of us probably figures into that. While you are focused on this big thing of "potential", many others are probably focused on "likely reality". The kid is going to be.. another person. Not Mozart. Not Einstein. Just another person, with a middle-management job (or less, for many of the folks who are in the position of considering an abortion). Yes, they would be unique, but the level of actual differences from other people on the planet isn't large - we are not a genetically diverse species, you know.
Even if I accept that an unborn child is not a "person" until 24 weeks post-conception (a notion I reject), is there truly no sense of wonder that the genetic material growing in a womb will, given enough time, grow into a sentient being like ourselves?
It is difficult to see the everyday as wondrous. Seven billion times recently. Headed to ten billion, and possibly more than the planet can sustain within one or two more lifetimes, with attendant crash and misery if we go too far. More on this in a moment...
Are we really so privileged, having been blessed by fate and good fortune to have grown into human adulthood, to dismiss off-hand the "potentiality" of a sentient life yet un-lived?
Oh, now you have to be careful. You are, in effect, asking a young woman to give up much of *her* "life yet un-lived" to bring this kid into the world and support it. It is not by any means clear that the potential life yet un-lived is a greater thing than her real and current life yet un-lived.
I guess I'm just suggesting that this is something to be seriously considered.
Yes, but there is another, just as serious consideration. To steal from Thoreau, most folks live lives not of "potential", but of quiet desperation. A child at the wrong time increases that desperation, and, whatever "potential" it has, the child will also feel that desperation. You ask if it is fair to waste the potential. You should also ask if it is fair to knowingly let it have that potential, only to have it squashed by already-known circumstance.
To be brutally honest - it seems inappropriate for us as a society to *force* people (either by law, or shame and societal pressure) to bring kids into the world but then take squat-all responsibility for that kid's life. That's very much like being a dead-beat dad, isn't it? Society must take responsibility for it's actions, just like the father.
Give us universal living wages, universal healthcare, and universal education opportunities, and then we can talk about forcing or pressuring people to bring kids into the world. Until then, the choice should rest on the people who *do* take responsibility for that kid.