You’re right; surely abortion, miscarriage, and stillbirth are all equally bad for the embryo/​fetus/​child and should either be counted as 0 or −70 depending on whether you count these as people or not. (Unless there’s some kind of Shapley value argument where an abortion of a 5-week embryo counts as only a fractional loss of life because it might have miscarried anyway even if there had not been an abortion, but I don’t think anyone is proposing such an accounting here.)
It’s frustrating that people downvoted you to −6 agreement but no one bothered to explain what they disagreed with.
You’re right; surely abortion, miscarriage, and stillbirth are all equally bad for the embryo/​fetus/​child and should either be counted as 0 or −70 depending on whether you count these as people or not. (Unless there’s some kind of Shapley value argument where an abortion of a 5-week embryo counts as only a fractional loss of life because it might have miscarried anyway even if there had not been an abortion, but I don’t think anyone is proposing such an accounting here.)
It’s frustrating that people downvoted you to −6 agreement but no one bothered to explain what they disagreed with.