>>68236 (OP)
as far as i understand bmi at the end of the day is a rough "good enough" estimate that's basically based on the average male of european descent
so, for example people with a lot of muscle will have bmi values that would indicate they are overweight which obviously isn't true, and i think that when bmi is adjusted for asians you start being obese at like 23 already or something like that and their underweight threshold is lower as well