Out of all of the articles that I've read regarding weight loss, none seem to refute that: lowering calorie intake, and some moderate exercise will result in healthier body. If you want to reach a certain aesthetic then that's fine, but as far as I know the "obesity problem" is more about a persons health and well being, not being aesthetically pleasing. So we can sit here and point fingers at what diet is best or wh…
As somebody who has gone over the past decade from no exercise to running 15+ races and is now training for my first triathlon I am happy to say that "will to exercise" is not actually the problem for anybody I know. That certainly wasn't my problem.
The good news is that people actually study this for a living. If you want a readable introduction to the limits and uses of willpower, McGonigal's The Willpower Instinct is a fine place to start understanding why, "Oh, those people are just weak," is a lazy and wrong answer.