The more I think about it, the more Frozen rocks. Let it go: A song about dumping horrible painful coping mechanisms that aren't working. "conceal, don't feel, don't let them know" - the reason behind it is to keep from causing pain to others, but what a horrible way to live life. Unfortunately, the thing which needs to be coped with is still present. So although letting go of the bad coping mechanism feels great, there's still a need for a better coping mechanism. Because whereas we all have occasional bouts of emotional excess, Elsa's bouts place others in mortal danger. So she needs a way to deal with that. Hence, the rest of the movie. At the end of the movie, she's got a new coping mechanism - let loved ones in, feel and express love for them. Not exactly sure what this means for her next bout of emotional excess. The hope, is that the next time she gets all worked up, the negative will be tempered with all the positive in her life, and she won't end up sending ice daggers through her loved ones by mistake. But at least there's hope. The loved ones all know the risk and remain loved ones. The townspeople know the risk and are still willing to have her as queen. Hmmm - a person learning to cope with an extreme destructive reaction to life's stresses, without medication or therapy or parents. A sister loving her despite the fact that she literally risks injury to do so. Yeah, I may not be very close to such a situation, but I know lots of people have similar struggles. (Actually, I think Olaf may count as therapy.)