OK, fine, I agree that it's hard to predict exactly how a hypothetical policy change might play out in practice.
So let's treat it as a philosophical thought experiment, like
The Trolley Problem. Philosophers and ethicists spend a lot of time thinking about the trolley problem even though it will probably never occur exactly like that in real life.
So, as a thought experiment, let's just assume for the sake of argument that the following is true:
We live in a society where, if you oppose abortion, then you are required to be willing to adopt and raise a child upon demand. Would you still oppose abortion if that was the price you had to pay?
If the argument is based on the right to life of the fetus, then arguably, the woman has to carry that child to term because otherwise the fetus would die. But, once the fetus is born, then
anyone could take over the role of feeding and caring for that child if the biological mother doesn't want to perform that role. Obviously the child's right to life doesn't end when it is born, so
someone has to provide for it. Shouldn't anyone who believes that also be willing to be the person who performs that role? Is this not a reasonable philosophical position?