@drdoombot sounds like maybe you’re probably one of those more muscular folks? I agree its not a perfect tool, but I’m speaking from the perspective of someone who does lots of health maintenance exams for women.
I have about 40 minutes my doctor colleagues do annuals in 30 to deal with gynecological issues, update a health history, review and counsel on lifestyle issues like smoking, drinking, drugs, eating habit, exercise, caffeine, stress, talk about their relationships, figure out if they’re up to date on immunizations, mammograms, diabetes and cholsterol checks, colonoscopy, bone density screening, talk about any new symptoms they’re having, update family medical history, and then do a physical exam. The BMI at least gives me a simple framework to start with. It’s hard to imagine adding something more complex.