The study pretty clearly shows that within each group, activity helps! It’s just that the effect is not as large as weight. You’re arguing against a straw man.

The study pretty clearly shows that within each group, activity helps! It’s just that the effect is not as large as weight. You’re arguing against a straw man. The full argument would be “it is pointless to try to undo the health effects of excess weight through activity alone, as an active overweight person is less healthy than a sedentary normal weight person”