that is a 'shorthand' response to a much greater debate being hinted at here. Abortion has great repercussions to the woman and to society that other sins might not (seem to) have. But we read that all have sinned and fallen short of His Glory ... all are in need of forgiveness on an ongoing basis, whether they have had an abortion or not.
That is true enough, but if one is mindful of the Bible they know there are certain things that presage the destruction of the society practicing them.
Killing one's own children, and aggressive homosexuality seem to be the two most prominent.