Playing devil's advocate, but diabetes is rather manageable anymore. Even maintaining a terrible diet with diabetes can be fairly easy to counteract with medication. Its position is probably based upon the mindset in modern society of "Got a problem? Pop a pill!" Which is fine, it's wonderful that we've reached a level of medical technology that can use simple treatments to keep people in decent condition despite severe defects. But it also removes the mantle of responsibility, as we see with fats all the fucking time, some irresponsible and destructive behavior gets rewarded.