There are many reasons for allowing women the choice to be in military combat situations. Your idea is only one of them. Lots of people in the military don't think ahead to a military career. They just want to serve and contribute fully. I served in the National Guard in the 70s and 80s. I was one of five girls in my family, no boys. I was relegated to "personnel" and typed and filed during duty hours. It was not what I would have chosen to do. We were a Field Artillery Battalion. I wanted to serve on a howitzer crew.