That's really the key, isn't it? You see all these programs and pills etc. and they want you to think, "If I take this and jog 7 miles a day and eat healthy, I'll lose weight." Yeah, but you know, maybe just try the last two.
Chiming in with the obligatory "it's not that simple" response. There has been a lot of more recent research done that shows that it is NOT just all about CICO. In fact, it's hardly about that at all for the majority of people. There are numerous things that can affect metabolism (hormones, illnesses, medications, autoimmune conditions, etc), and ignoring that just serves to shame people into thinking their weight gain is their own doing.
My husband has gained about 30 pounds in the last year. It's due to medication for severe depression/PTSD in combination with (finally diagnosed but not yet managed) severe sleep apnea. His cortisol is sky high. He has not changed his diet. He eats around 2000 calories per day mostly healthy proteins and carbs and fruits/veggies. He is a Marine. He works out 6 days a week for an hour. He does 25 pull ups a day. He is still gaining weight every week, regardless of what he is eating/doing as far as exercise. It's an unfortunate side effect of the medication that keeps him from wanting to off himself, so the absolute last thing he needs is someone telling him to "just eat less and exercise more."
Off my soapbox now. Carry on.