To be fair, the only reason Nom is upset about BMI being a bad predictor of obesity is that he's having difficulty finding sufficiently fat white women by BMI alone. Yes, it's not a useful tool for predicting obesity. That's just dog bites man at this point. Getting self-righteous about how a metric supposedly tells you you're overweight when you've already got it in your mind that you're not overweight and you already know it's a bad metric is silly. BMI has its uses, but reinforcing your body image and self-esteem just isn't one of them.