I was reading that thread with the Q&A and this answer seemed good to post in this thread.
RAF: Why where you so cruel to tobias by taking rachel away from him?
K&M: Tobias was destined for a life of sadness, don't you think? But there was always nobility in his sadness. As for Rachel, she was the ultimate warrior: without a war to fight, what would she have done? And what better way for her to go than by fighting a desperate battle against impossible odds?