How does Hally turn the dance contest into a metaphor for life?

As he helps Hally with his English assignment, Sam creates a poignant simile that compares ballroom dancing to a harmonious world. If ballroom dancers perfectly perform their numbers, the dance is fluid, and no one bumps into one another. This is very different from real life, where people are constantly bumping into one another, physically and verbally. Sam laments that if humans could live life in the way that a champion, as opposed to a beginner, dances, then the world would be a better place.