Phil reasoned that Shepard would return to her world, to her own conflicts and war where she was needed. But as she heads into the portal, she must know that she has left Panem stronger than before. That she has shaped the world in a positive light, made their friends and allies stronger with her presence. She seemed like the person who influenced others, guiding them to victory alongside her.

"Good luck, Commander Shepard!" Phone Guy called out, naming her rank and surname as a proper soldier would. She made him capable, stronger and willing to fight. He never got to see the Normandy in person, only through the last Arena...but it showed just how people on her world relied on her. To keep her would be denying those people her strength, and that would be disastrous. It was the farewell Shepard deserved: head up high, crowned in light as she returned to her crew.