The parallel might be that both drugs and abortion are problems created by well intentioned people.

If there had never been any law against or for abortion, the vast majority of people would still see it as a highly unusual act. And when a woman did have an abortion, others would not see it as a religious or political issue but as a girl who had some problems and the focus would be on understanding why she wanted to kill her child, then solving the problem.

If there had never been any drug laws then there would not be a massive number of synthetic pseudo opiates and complex molecules invented in drug labs. A person who has free access to a natural drug, e.g. marijuana, opium, mushrooms etc, does not choose synthetic versions for the simple reason that synthetic versions are not as pleasant. And drug crime would be limited to dui, no need for addicts to steal to support the cartels so minimal robbery. Potheads and opium addicts are much mellower than money addicts.