BMI is stupid. Its a simplest and highly inaccurate method of determining whether someone is obese. It totally disregards someones muscle mass and bone structure. Look at it this way. Take a 100 meter sprinter. And then take a 10K runner. The BMI of the sprinter is much greater than the 10K runner. Shelly-Ann Fraser-Pryce is not obese. She has very little fat on her body. But her BMI is much higher than Agnes Jebet Tirop a Kenyan 10K record holder. BMI is fake science. We have ways of measuring fat. BMI is not a good one.
No arguing with you but what would you replace it with for a simple ballpark estimate? I use the “pinch an inch”, but my family has the eat anything and stay wirery genes. It hasn’t been an issue until I hit my 50s.