I'm merely pointing out that it's apparently not as simple as stepping on a scale because no one can get their heads straight about high BMI's causation to begin with or what to do about it.
It just seems much simpler to me to take an actually accurate test once a year and prescribe purely based on the accurate testing. That way we also get skinnyfat people.
Imagine if once a year, your boss sat you down and went "Hey, you did a terrible job this year. No promotion."
You might ask him why he didn't give you any feedback earlier so you could have fixed the issue. "Oh, well I only give feedback once a year since it is hard to do".
You need regular (weekly, biweekly) feedback on your diet.