Do many of the pro-life people realize that some states had already legalized abortion prior to Roe v Wade and some were close to doing so. So overturning Roe v Wade will not end all abortions.
Another point to be made is that if life begins at conception and this is made the law of the land that many methods of birth control will be outlawed.
This may go over fine with conservative catholics, but all of the people I have discussed this issue with do not want to lose the pill.