That's why "balanced diet" is an absurd recommendation for fat people. If you're following a balanced diet, you probably don't need to lose weight. Atkins himself recommended a balanced diet, just avoiding refined carbs, for most people.
One personal comment: I wouldn't follow any diet proposed by activists of any kind, specially when their main motive is their particular ethics that, at least for me, suggest a strong bias. Unless of course I share that same ethical vision. Edit: I actually wouldn't follow any life advice from activists of any kind, I'd rather have my own agenda.
However the current size of the human population is incompatible with anything other than the vast majority of people getting the vast majority of their calories from carbs. For that reason, people recommending a large reduction on carb intake across the board will almost certainly continue to be marginalized, pushed to the sidelines in most mainstream discussions.
The top ten in order are: corn, rice, wheat, potatoes, sassava, soybeans, sweat potatoes, yams, sorghum, and plantains. These are all carbs! If we accept that low carb diets are better for people, then we must either accept that we are going to feed humanity sub-optimally, or that humanity is well past the healthy carrying capacity of the planet. There is simply no way in hell we can get 7.5 billion people eating keto, or anything close to it.
Vegan activists are proposing a dietary future that is very much in line with the current global agro-industrial status quo. However low-carb proponents are proposing a diet that, if universalized, would necessarily put them in the camp of people like Pentti Linkola.