LOL - I'm not getting hostile. Every person I've known who's done the Atkins thing has lost weight. Fine. But the healthful key to losing weight is to build muscle and engage in aerobic activity. Atkins is a quick fix - few who do it also exercise.
You sound very hostile. Even so, not that you have any proof, but I would venture to guess that MORE Atkins people exercise than do your average American.
The problem with YOUR quick fix solution [exercise] is that it doesn't work for most folks who are over a certain age. Exercise contributes very little - if any - to weight loss after a certain age. And it is only LOW FAT [the one *YOU* are suggesting], LOW CALORIE, LOW PROTEIN diets that cause muscle loss. Atkins is none of those.
As odd as it sounds, I think that you'll find quite a few people that use it in the bodybuilding and powerlifting "community" (and I hate to say that word, community). Its not necessarily a permanent thing, but a very useful tool for overcoming a sticking point or when other approaches fail.