The most important thing in life is to love someone. The second most important thing in life is to have someone love you. The third most important thing is to have the first two happen at the same time.
In a hospital, there's not anyone who's generally trying to do you harm. You're generally given a backstory about what happened to them, but not about their life, so you get to work on saving their life. But you know whose lives you're saving overseas, in the Army, to a certain degree. You know whether's it your guy or a bad guy, and it's generally not anybody in between.