Since BMI can't differentiate between fat and muscle, it breaks down for people who are very muscular. That said, most people are sedentary and hardly even exer

Since BMI can't differentiate between fat and muscle, it breaks down for people who are very muscular. That said, most people are sedentary and hardly even exercise, so BMI is a good approximation. The people who are very muscular are probably well informed about this caveat that no buff bodybuilder thinks they're the same as an overweight person just because their BMI is the same.