Ah. But even so, and even in the times of our grandmothers (mine were born in the 19th century) marriage to the father did not necessarily mean that one STAYED with the father. Or that ‘meeting another man’ and then going on to have children with him might not have happened.
Of course, the thing with these ‘what-if’ scenarios (especially popular with fans of Frank Herbert et al.) is, is that they are ultimately a moot point. What happened, happened.
And one cannot as I noted speculate that had any particular event (abortion or otherwise) NOT occurred, then ‘one would not be here’ without allowing for literally billions of 'what-if’s. Seriously, if your grandmother had not had the abortion she might have (as many did) go off to a relative, have the baby in relative secrecy, put the child up for adoption, and go back on with life. Or she might have married the abusive father and HE might have had an epiphany and turned out to be a real great guy after all. Or the child might have grown up to be a hitman for Al Capone, or else an American Cardinal.
Or if there had not been an abortion, your grandmother might have been bitten by a snake, caught typhus, developed septicemia, been knocked down by a carriage, etc. etc.
Finally, and here is a headscratcher, unless you are a very young person indeed, since abortion in the US was not LEGAL until 1973 (although some states had it legal in the late 1960s), your grandmother in having an abortion DID have said abortion illegally, so arguing that you’re alive because abortion is legal seems kind of off.
Above all, how many would be alive today if abortion were illegal is a far greater question, and one we can actually measure, as we know how many abortions have been legally carried out either in medical/quasi medical offices as well as through prescription drugs. In the US that number in the last nearly 50 years is what, some 60 million people.
All those people were DIRECTLY killed because abortion is legal. That’s a different kettle of fish from arguing that if Granny had had to ‘have the baby’ back in the day, that there were ‘lots of people’ alive NOW who wouldn’t be. Since Granny did have the abortion there’s at least ONE person now who is NOT alive, isn’t there?