This might be true in thermodynamic sense but it is a useless and trite statement.

It's like saying "people are in debt because they borrowed money" - true, but banal and trivial, and pretending it's the whole story and saying nothing of medical debt, student loans or living from paycheck to paycheck and payday loans dayloans is only good for feeling better than someone, most likely while pretending that all people in debt are stupid because they buy too many cars and TVs or whatever.

The whole area (both nutrition and debt/poverty) is very complex, especially when looking at whole society. Thinking in simple caricatures, and dismissing people as stupid is helping nobody.