CDC's usage of BMI is what it was designed for: To measure populations/as a generalization. Your retort is something people repeat, because they don't seem to

CDC's usage of BMI is what it was designed for: To measure populations/as a generalization. Your retort is something people repeat, because they don't seem to grasp that originally the point of the retort was when people are using BMI to discuss individuals (wrong) rather than populations (correct). This is the correct usage. But ultimately there's little data supporting the supposition that Americans have so much muscle they're incorrectly categorized via BMI over population level samples, whereas there is plenty of data suggesting that since the 1970s and the subsidization of corn-created sugar, that Americans have gained body fat.