“Why does affirmative action not stigmatize the many qualified women/girls who are admitted? Why only URM? Why do we believe that affirmative action policies are only for URM and not for women as well?”
Nobody on this thread said that only URM are stigmatized. Many have said that athletes, legacy admissions and students from underrepresented states also benefit from their hook and are therefore stigmatized. Not sure what the point is you are trying to make about women/girls? At many schools there are more qualified female applicants than qualified males and therefore no admission advantage being a woman.