I often can't help but feel that obesity needs to be redefined as more than just your weight.
Redefining a condition is nothing new. Diabetes Mellitus used to be defined as having pee that tastes sweet to the doctor!!
We're all aware of outliers who are only "obese" by BMI standards but have a high muscle mass, etc., which honestly reminds me more of people with "athletes heart" (which would otherwise be bradycardia + oversized heart), autistic hyperfixation (which isn't really stigmatized as much as the similar hypomania), or having a large frame for a woman.
But I also think emphasizing weight leaves out why obesity is deadly- all that extra fat.
Obesity should be defined as a form of swelling resulting from excess storage of body fat. It is a metabolic disorder resulting from compulsive behavior.
Sounds a lot grosser than just a bigger number on the scale.
Plus who knows if certain forms of localized obesity are worse. Defining obesity as being above a certain weight for your height and maybe gender, frankly, is like measuring sound as decibels and only decibels.