Outlawing murder, theft and rape does not stop all people from committing those crimes either - does that mean we should get rid of those laws also? What a stupid rationalization.
Booze causes lots of deaths, injuries & damage & Prohibition did not work out too well.
Yeah, we can ban abortion all right. Then rich women will fly to Europe if they want an abortion and middle class women will drive to the abortion clinics that will spring up just over the border in Canada & Mexico. There will also be lots of "miscarriages" and "treatments for irregular periods".
What are we going to do? Send out the Fertility Police like in Communist China or Ceaucescu's Romania to see who's pregnant or not?