He's sharing a three bedroom apartment with two roommates. There isn't some beautiful moral to be taken here. what about when you have a family? What about when you have children? What about when you have a medical expense come up? Insurance is very expensive.
I hate these anecdotes that imply that you can just live simply in the United States and be happy. So much is left unsaid. Maybe this guy wants to live an ascetic life, but most people don't.
I understand that the idea of spending less can apply on varying scales, but this implication that you can just give up the material world and be a musician making minimum wage and be happy is silly.