BMI is as flawed as people's x/y varies, where x is e.g. shoulder width and y is height. That isn't very much, really. Some people are far from the norm, but g

BMI is as flawed as people's x/y varies, where x is e.g. shoulder width and y is height. That isn't very much, really. Some people are far from the norm, but generally the broad-shouldered people aren't the short ones.