Men died in the developement of the technologies that allow us to leave the Earth and enter orbit in space as well. The difference was that these men knew that they could die from hanging onto the very edge of developing technology.
The difference is that unborn children can't make the personal decision to sacrifice themselves on the altar of medical technology. The difference is between a pile of broken lightbulbs and broken babies.
For you and me, that is indeed the difference. Problem is, the folks on the other side of the argument obviously think otherwise. That's one of the points I'm trying to make.
You're basically assuming that the other side shares your moral viewpoint on the matter, when in fact they do not. You've got to be clear on the grounds of the debate.