They are absolutely right, some mothers will still kill their unborn children even after they are protected under the law as persons. In fact, some mothers still kill their born children even though it is illegal to do so. People still rape each other even though it is illegal. Same with assault. Same with child abuse. Just because evil will continue to happen if outlawed doesn’t mean we shouldn’t do everything possible to confront it.
Because I am fully aware that outlawing abortion will not completely stop the killing, I am working to change people’s hearts. Change is hard, especially when it results in an increased level of responsibility. But this change is absolutely necessary if we are to ever truly value the dignity of all human life.