The problem isn’t the number, it’s how we measure it. The linear scale of BMI is complete BS and has no basis in reality. Even the “inventor” said he never intended for it to be used as an accurate measure of health. Yet here we are.
BMI is only good for average range of heights, say 5’6 to 5’10 and it does not take into account that some people can be built like fullbacks, but be good range for their body composition.
It’s really useless.