Americans embraced the low fat approach and didn't question it. However, it was so difficult to follow that the majority went the other extreme. It was a relief after trying to eat "correctly". There are studies that contradict whatever it is you read. There are always studies and statistics that contradict each other.
The Atkins way of eating has nothing to do with reducing total calorie intake. Not in the original plan that later was modified to please those who had an interest in what Dr. Atkins wrote.
1. For those of us who have the tendency to overeat feel no need to following this plan. Eating food with a higher fat content than what the USDA recommends results in more satisfying meals.
2. The metabolic state we put our bodies into through ketosis has nothing to do with restricting calories. Read the science behind it.