That argument would be perfectly valid if the argument were in fact over the freedom of one individual to do as she will with her own body. The problem is that in practice the argument revolves around giving a one woman the absolute choice not only over herself but two other people. The lie that it is a matter of choosing what to do with her own body gets very tiresome. Giving her the power to murder one other person and/or control at least two decades of yet another person's life, neither of whom get any choice in the matter is most reprehensible.
Did you read the entire article?
It addresses your point fairly well.
The very idea that it is a full human life at conception with all of the rights of an adult human being completely drops the context of what "human life" means, what defines a "right", and the physical/metaphysical relationship between the mother and the fetus. It is one based on faith and faith alone, and laws based on nothing more than religious faith have no place in the American system.
That's really all I have to say on the subject. A proper discussion of this issue goes beyond the bounds of my patience and the rules of this forum.