I highly doubt that anyone doing Keto with a good amount of success is doing so without tracking macros.
It is ironic that you'd decry ignorance and oversimplification when in point of fact you are guilty of the same in doing so.
"It included a racially diverse group of 150 men and women — a rarity in clinical nutrition studies — who were assigned to follow diets for one year that limited either the amount of carbs or fat that they could eat, _but not overall calories_." emphasis mine.
This particular study is touting the virtues of not tracking calories. It's basically what the entire article is about. Eating low carb without counting calories.