Even if you grant that many overweight/obese people merely won't exercise, certainly at least some people can't exercise.
Re:Exercise Releases Brain-Healthy Protein
by jschwartzi on Wednesday June 29, 2016 @08:23AM
(#12001171)
The important question is how many people _can't_ exercise, and why, and what exercises have they tried?
Honestly, considering the overweight and obese population is growing we have a problem with systemic overeating that needs to be corrected first. It doesn't matter how much exercise you do if you eat more than you need.