Some doctors are not good with subtleties. To them being overweight is a medical problem, period. When confronted with data like the fact that half of the centenarians in the Ashkenasi centenarian study are overweight or obese, their first thought is that the study is in error.
Subtlety eluding these doctors: Being overweight is sometimes a medical problem, sometimes not.
When a person becomes so overweight, his quality of sleep, quantity and quality of exercise, and his nutrition are also disrupted, it is a problem.
When a person is gaining weight in part in response to excessive stress, the stress is the problem and the weight gain compounds it first by adding to stress about overweight, and then compounds the problem again when the weight gain interferes with proper nutrition, sleep, and exercise.
Subtlety eluding these doctors. When being overweight is not a problem: when the person is a bon vivant, when he/she is not overly stressed, when being overweight is a natural consequence of the enjoyment of life and one of its great pleasures, abundant, delicious food with adequate nutrition, and when the quality of sleep, exercise, and nutrition are not compromised.
We would need fewer doctors if we had more bon vivants, and if we had more bon vivants, we would necessarily have fewer worriers and stressors, who are harming their own health and whom doctors cannot help. If doctors got a clue about how the mind works and how the body and mind can work together, they could help the worriers and stressors.