This got me too, the lies people tell about their medical conditions to justify their weight.  I've been a type 1 for over 30 years and have been on a pump for almost 10.  My BMI is 20.  You take the amount of insulin needed to cover the amount of food you eat, the same amount your body would produce naturally if you weren't a diabetic.  Almost all the type 1s I know are a healthy weight and they also tend to be shitlords.  We tend to hate hearing overweight type 2s complain about having diabetes when they most likely helped bring it upon themselves and many could get rid of it if they lost weight.  The amputation jokes aren't pleasant either.