Earlier quoted context omitted.
Also, meditate, fast intermittently, get therapy, and develop healthy ways of handling stress and dissatisfaction. Everyone’s path is a little different. What is only a little difficult for some might be downright impossible for others (or feel that way).
No, those things aren't nearly as important. Handling stress and therapy can also be replaced by some physical activity as well. General advice that would work for 95% of people shouldn't be criticised because it doesn't address the other 5%. If people did it then there'd be far more money in the system to pay for usefully targetted specialist treatment for those people.
The emotional/psychological side is important, because the person must make long term changes in their lifestyle.
People tend to over-eat for a reason, and typically it is a reaction to stress or some emotional/psychological need which isn’t being met.