Depends on who you ask, but in olden times, and India has a lot of antiquated values, but again, depends who you ask.

If you're upper middle class and fat in America, you usually are actually lax in your dietary habits. However, you can also be a poor or lower/lower middle class person who has issues with maintaining preventive care, like working receiving in retail or two jobs in the service industry and work hard, but have no knowledge of good dietary practices, and/or time to prepare good food, and that shows as obesity. The high cost of inflation from greedy corporations and lack of basic food items due to logistical issues not helping poorer Americans.