@bandito
You're not quite listening to me. I've never said that you can't lose weight on a calorie restriction diet. Only that in the long term, obese people in studies have shown that it is practically impossible to keep off the weight. The academic data shows this.
Do you really think anyone eats 7000 calories just cuz they want to? Of course not. They are unable to receive the leptin signals in their hypothalamus that allow them to feel satiated. You need to repair that transmission of information from your fat to your brain. Keto can do that.
There are more factors to this like the fact that sugar is an addictive substance by almost every qualification, the fact that poor people are disproportionately more stressed than wealthy people which does metabolic damage and encourages binge eating, the fact that the number of fat storage cells in your body is pretty much determined by age 2.
There are so many reasons for metabolic syndrome, but to try and water down the issue to being merely about the number of calories is simply wrong in every way. If you're planning on going on a vacation in California next month, and you want to quickly tone yourself, go ahead with a calorie restriction. If you want longterm benefits and health, it's been academically proven that it won't get you there.