[makeitdouble]

> It's rare for people who are physically active, and have a balanced diet, to suffer from obesity.

Looking at it from the other angle: can obese people be active and have a balanced diet ?

The answer is yes. In particular you can be obese and maintain your BMI at the same level while being fairly active and not overeating, that happens a lot with people gaining weight and reacting to it, but without going down.

From the pool of people physically active and with a balanced diet, what's the split of obesity is a question I don't have the answer to, but the lifestyle part doesn't look like a good differenciator to me if we're solely focusing on current obesity.

PS:if you eat a LOT more without gaining much weight, imagine eating a LOT less and see very little change.