By allowing other women to make different decisions than she would. Allowing trans people to exist destroys her identity as a woman because other women might be different or have different experiences. Allowing others to get an abortion destroys her identity as a mother because if they made a different choice and thought it was right for them… how can she ever know if her own decision was right? Or maybe she was never afforded a choice and so seeks to deprive others of what she was denied.