Why is it when you see someone who is a 1,000lbs getting cut out of their house….?

Why is it when you see someone who is a 1,000lbs getting cut out of their house and put on a stretcher by 14 paramedics/fireman because they are immobile they always say in an interview, “I don’t eat a lot.” Do they really expect us to believe they got between 500lb – 1,000 lbs by eating only 1,500 calories a day?