BMI was created in the 18th century by a European polymath–Adolphe Quetelet, who was obsessed with figuring out averages–and was never meant to be used as a medical tool (you can look it up)

This is an issue that mainly affect fat or “"overweight”“ people and I’m not trying to derail that but just to give people an idea how bad bmi is at representing reality. Back when i was an active athlete I once had a body fat percentage of 12 and a bmi that claimed I was obese at the same time