Putting ANYONE on is a risk........ a woman matters not ........ just get the right woman...... Ohno Conner was not the right one
I don't know why Reagan made that pledge, but it was a huge mistake to do so. For one thing, its highly unlikely that it gained him any votes against the inept and hapless Jimmy Carter. For another, making such a pledge boxed him into a corner by pretty much forcing him to honor the promise with his first Sup Court vacancy since there was no guarantee that he'd get another.
Had he waited, then perhaps by the time of the Bork-Kennedy nomination there would have been a known conservative woman qualified for the job.