Isn't the whole "abortion rights" narrative about the idea that children are property, not human beings? Why would people who have that view of children care about kids' well-being after adoption?
Neither is based on responding to the actual needs and rights of the child: the right to simply go on living, and to be raised and loved by their father and mother. In the acknowledged tragic situation where the child's father and mother are unable to care for him (e.g. the death or dereliction of the parents), we still have a duty to get that child into a family with a man and a woman in a stable marriage who will fill the childn's needs for a father and mother.