In a post from a couple of years ago, Steven Wedgeworth offered this interpretation based on his experiences in talking to people outside of abortion clinics:
Abortion, at least today, in the Southern states, is not some sort of last ditch effort to preserve one life, which would be legitimately threatened, at the tragic but necessary expense of another. Instead it is a projection of strength on the part of the would-be mother.
What do I mean? Abortion is today a way, not to get help in a difficult situation, but to avoid needing help. It is a way to “take control” of one’s life and prove self-sufficiency. This is why it is pitched as a form of “women’s equality.” Abortion is what it takes to see to it that a woman is not inferior or weak. It prevents her from being at someone else’s mercy. This is also why it is quickly becoming a sort of “human right,” something which must be provided by all just governments. To not provide it for women is basically framed as an injustice, a lack of fairness and equality. In short, it is a legal device to prevent the need for charity or other concessions to a weak situation.