In the vast majority of cases high BMI maps pretty directly to obesity, the number of bodybuilders hanging out in the obese and morbidly obese ranges is a vanis

In the vast majority of cases high BMI maps pretty directly to obesity, the number of bodybuilders hanging out in the obese and morbidly obese ranges is a vanishingly small number in comparison to those overweight. It's easier to just let the bodybuilders not take the shot - given that's their right anyway - than to use bodyfat % or some other measure as the prerequisite for boosters, even if those measures more specific they end up less accurate (hope I'm getting those terms right)