It is flawed because you choose to overlook the relevant points. Man knowingly puts a woman into position to ingest a substance which subsequently causes her harm. The substance itself isn't the point. It is that he knowingly caused her harm. It doesn't matter if it is acetaminophen, St. John's wort, or her OCP. Change it to whatever you want, that doesn't change his guilt. She was given a medication under the guise of a legitimate prescription, which he tampered with, in an effort to bring about harm.
The issue of unilateral abortion is a straw man here. He assaulted her and should go to prison. If you (the general you, no you @
urge ) don't want to worry about a child, use multiple forms of contraception or remain abstinent. And contraception fails. If that is the case, hire an attorney and voluntarily have your parental right terminated. It is possible in my state, and I'm guessing it is possible in a lot of states. If you can't afford an attorney, look into legal aid. Or don't engage in activities that produce children without taking the proper precautions. Life isn't fair. But while that is the way things are, play the game by the rules or make sure you are firmly entrenched on the sidelines.