BMI is a complete farce when it comes to any measure of fitness.
It’s completely dependent on just two numbers, height and weight.
Every single linebacker in the NFL is Class I or II obese according to BMI numbers.
Heck, if you’re a recreational weight lifter chances are your BMI tells you you’re obese.
Yep. We use it in the Navy where we've kicked out perfectly healthy sailors while fatties with fat necks slip "make tape".