Two key points. This:
Obesity continues to climb but not because of a switch to a plant-foods rich diet naturally low in fat and high in carbohydrate (TOTAL carbohydrate, that is). Rather, obesity increases as physical activity decreases and as sugary, fatty, salty processed food consumption increases.
More serious, however, is the effect that this mythology has had on suppressing information on the extraordinary health value of diets that are truly low in fat (10-12 percent). I am referring to a whole foods, plant-based diet that avoids added fat and processed and animal-based foods. This diet contains about 10-12 percent fat, sometimes pejoratively referred to as "extremely low fat". Call it what you will, but this diet (also low in total protein, about 8-10 percent) produces, by comparison, "extremely low" incidences of sickness and disease. In fact, it now has been shown not just to prevent these illnesses but to treat them. Importantly, this dietary lifestyle cannot be dismissed by the mythological argument that so-called low fat diets have been proven to be questionable.