Pro-Choice on Baby-Killing, Anti-Choice on Drugs

By what leap of law and logic does an otherwise intelligent human being come to favor interdiction of drug use, prostitution, and gambling even as they tolerate--nay, celebrate!--abortion-on-demand? I understand elevating a woman's "right" to choose to kill her fetus over her fetus' "right" to life. (I'm not entirely with them on this, but let's leave my warped value system to one side for now.) But if a woman has a right to kill a miniature human being who has taken residence in her body because--wait for it--it's her body, she a fortiori has a right to ingest, inhale, or inject the substance of her choice, doesn't she? I mean, it's her body!