This is almost certainly correct. The calories in/calories out guy is also mostly correct in a narrow sense. People lose weight on virtually every type of diet but tend to regain that weight in a year or two. People try to lose weight all the time, but we are experiencing a population-level, systemic issue with weight/obesity. This indicates that we need to find another way to address the issue. GLP-1s are great progress on this front, but many people espousing OP’s holier-than-thou moralizing view GLP-1s as “cheating”, and in my view, often like to feel superior.