They can pick and choose here. If they think you are going to be harmed seriously be being kicked out of the cancer (like, if your whole life revolves around it), they can at their will. But, I have seen plenty of big fat tubs of lard, including one that was a regular pio-sneer despite being so fat that she needed a walker to get around (I am not referring here to people that "could stand to lose 50 pounds" here--but people whose weight was actually interfering with their lives). I believe simple lack of proper exercise, stress, not getting enough sleep, and the poisons put in most fast "food" contribute to that kind of obesity more than the sheer quantity of food eaten.
On the flip side, they can counsel (hound) you to lose 40 or 50 pounds. You went to the doctor, and he told you that you could stand to lose 40-50 pounds. Your eating habits are not out of line with normal--it's simply the crap "food" (the Pio-Sneer Diet), not enough sleep, and not enough exercise that is keeping you fat. But, for that 40 pounds, they will give you a hounding call. Of course, if you cut back on field circus to exercise or eat better foods, they hound you for that ("Let's not allow your field circus to slip to lose that weight"). Then, a few months later, you are unable to lose all the weight. Now, they have their new toy--"Brazen Conduct". They told you to lose weight, you didn't. Therefore, they can now get you for "brazen conduct", even if "gluttony" is not involved.