TRuth be told bro
When doctors say THAT its either two reason "one they didnt find anyhting much and want to feel important and in command so tell u to fix a few things hoping u would say yes sir and respect them"
Or in reality they ARE really smart and actually do realize that HIgher Bodyweight BMI actually does lead to a lot of Problems from joint diseases to cardiovascular disease. I can almost gurantee you if you got an ultrasound of your heart right now, It will have some hypertrophy and lot of cardiologist consider that as Early Diastolic Dysfunction heart failure No matter how healthy u look or are.
If i had to guess it was probably the first one. Doctors are trained over and over to increase longevity and reduce mortality. They dont care about the quality of life just quantity and in the long run for details i Wont go into I somewhat agree and see the reason why. I used to be like you and be like and say fuck you Doctors only care about quantity of life not quality what the fuck..? But I think i see now why..
But all you have to tell the doctor is I understand Dr. XYZ, but my priorities are a bit different aNd I truly enjoy this, and if it means that its gonna cut a few years off my life and prone me to xyz disease than I am ok with it.