Sorry, but I have to call BS on that. Having lost ~50 lbs last year (after my blood pressure started getting scary), I can tell you it's all about planning and self-discipline. You plan a diet that fills your stomach and provides the major types of nutrients, yet gives less calories that your body burns every day, and you stick to it for a couple of months. No bullshit, no cheat days, no "let me just have that 500cal chocolate bar as an exception". And it works like clockwork, solving a bunch of health problems on the way.
As a matter of fact, I would call it very unethical to comfort people into an unhealthy lifestyle associated with major health risks and shorter life expectancy just to get an extra buck from treating numerous symptoms, instead of giving them a strong motivation to resolve the underlying cause.