How is it different from other low carb diets like Atkins?
it has a different guy's name associated with it and therefore a load of products to sell.
i've found simple callory control is less complex and self regulating. high callory, low filling items drop to the wayside very quickly. that usually means sweets and carbs but instead of targeting them you simply learn to balance a regular diet.
but that's too simple and doesn't allow for books, apps, and other things that someone can attach their name to.
As mentioned, ex-smokers and ex-drinkers, etc. have to psych themselves up to quit. That enertia is hard to stop once it gets rolling and often gets misdirected outward. Like the militant anti-smokers to demonize those who choose differently than them[1], the born-again eater risks fervently alientating those around them. Terms like "wheater" are a warning sign just like "sinner", "smoker", "drinker", etc.; they are used to make their continued personal efforts easier as they demonize their "past life" to help avoid back sliding.
As mentioned earlier, ANYTHING can become a religion. If you want to discuss this one in more depth, point those who are interested to the appropriate (read other) site(s) and discuss to your heart's content.