I know that medical decisions can be incredibly frustrating. While small consolation, it is important to remember that they are trying to do what is best for the future military member as well as his/her fellow service members. As the Senior Medical Officer at USNA explained to the BGOs, they need to think about worst case situations. IOW, someone with a medical condition functions perfectly well in normal life, including sports. But, the military, that same person may face unique situations . . . dust storms, high altitude and G-forces, severe stress, extreme heat or cold . . . and on and on. They have to consider what could happen under those conditions, which 99.9% of civilians never face. It's a different calculation and the results can be frustrating and disappointing.
To the OP . . . your DD is obviously exceptional. There are many paths to success in life . . . a SA and the military are but one. Undoubtedly, she will find the one for her.