I wonder if this is because it has less to do with fat and carbs and more to do with processed foods.

The Mediterranean diet is regarded as quite healthy by many health professionals but, it is also high in carbs and fat. But these are healthy, unprocessed carbs and fats. Whole grains and olive oil.

People going for high fat, low carb / low fat, high carb are usually doing so while also sticking to real foods.

> There is however no conclusive data that high-fat low-carb diet ... contributes to CVD.

Have to be a little careful with this claim. Dietary saturated fat and cholesterol are problematic either way.