Again… it happened enough that this was the reason it was legalized. In most of the free world.
At the end of the day, the argument is “pro life,” and the life of an actual infant or a woman in danger was weighed to be of more value than a clump of cells literally incapable of supporting bodily life functions on its own.
And as for how often it happens… did you know that homicide is a leading cause of death during pregnancy and the postpartum period in the United States, and that pregnancy and the postpartum period are times of elevated risk for homicide among all females of reproductive age?
Know what the other leading cause of death for this group was when abortion was illegal? Complications from illegally and unsafely attempted abortions. Because … again… women will continue to have them, they will just be unsafe.
At the end of the day, the argument is “pro life,” and the life of an actual infant or a woman in danger was weighed to be of more value than a clump of cells literally incapable of supporting bodily life functions on its own.