I agree that most of these examples compare murder to manslaughter, but if that distinction is supposed to be the theme for the whole passage, then the whole passage doesn't hold up.

Accidental death of a woman is not comparable in the same manner to the death of a fetus. Accidental killing of a woman would be comparable to the intentional killing of the woman. Accidental induction of premature labor would also be comparable to an intentional attempt at induction of premature labor. Apples to apples.

But then I don't reason like bronze-age shepherds. But, wait, the Bible was supposed to be inspired directly by God. I better learn to reason like bronze-age shepherds then.