Actually that is not true.
Sometimes things happen, life spirals out of control, you are left with a condition in which you have a problem walking, therefor cannot lose weight much with exercise because of a hip problem, you also cannot get an operation done because you are just that overweight, it's a catch 22 scenario.
So you just have to live your life, unable to walk more than 5m without being in pain and unable to exercise to get rid of the weight, anything else is just futile. Operation is a no go.
I should know, I'm talking about my dad.
Please don't categorize every fat person into one chunk (lolo get it?)