I never thought about it like that before but you're totally right. They think/want to think that finding just the right combination of things (no carbs after 6pm except on Tuesdays and lemon cinnamon water detox tea every morning, teehee!) will magically result in weight loss. The funny thing is this approach DOES work for other things- I've had terrible acne-prone skin since 12 or so (late 20s now) and maintaining a clear complexion really does come down to finding the exact right combination of treatments/products for my particular skin. But the magic bullet for losing weight has always been known: EAT LESS.