It is just a push back against the low carb publicity that has appeared lately.
In one way he is right - lots of people can lose weight eating carbs, or high carb low fat, or carbs with calorie restriction.
All sorts of different options available.
Some of us do better with lower carbs, and some of us do better with lower carbs and higher fat.
My personal view is that a heck of a lot of people who think they are 'fine' eating carbs are actually experiencing insulin resistance, and will go on to develop preD and type 2. Their bodies can only cope with carb overload and insulin resistance for so long before they start to develop the signs of metabolic syndrome which can progress to T2.
Kraft tested 1000s of people over decades, using insulin clamping and glucose tolerance tests, and demonstrated a very clear connection between the development of insulin resistance and later development of heart disease and type 2. Which means that the insulin resistance comes first - before the blood glucose goes wacky, and before the heart attacks.
But the article quoted above is about weight loss. And yes, sure, most people can lose weight eating highish carbs.
Doesn't mean that it will be good for their longterm health though.