Clearly, this woman was touched deeply by the film, or some aspect of the film that was very important to her. That her husband was unable to experience the same resonance – even to a small degree – was a sign he would never be able to appreciate or empathize with significant aspects of her own being. That's a pretty damn good reason to walk away.
Years ago, I was (briefly) involved in a relationship with a woman who lived in another city. On a Sunday morning, I was very eager to get the newspaper because I needed to see Calvin & Hobbes. She looked at me with something bordering on disgust, and announced "I hate Calvin & Hobbes."
I had a very bad feeling at that moment, and if I had listened to it, I could have saved myself an immense amount of duress, money and grief. I think this woman (the Frozen fan) listened to her moment; good for her.