>>101253150Some people feel bad about alcoholics and some don't, but none, or at least, almost none excuse their behavior.
With fat people you get something similar. Some people pity them, while others shame them. Their predicament doesn't tend to hurt other people as much as alcoholism does, but obesity is associated with very unpopular flaws, such as disdain for oneself, selfpity, laziness, etc.
Addictions evoke all sorts of negative impressions on people, as well as mental illness. Nobody wants to be around depressed people for too long, no one likes people with anger issues. It's not politically correct to admit it, but in general humans prefer sane and healthy individuals around them; that's just a natural instinct.
Detecting those diseases is easier the more obvious they are based on appearance, and unlike alcoholism or lack of anger management, obesity is quite easy to spot. That's the main difference it carries.
Sorry, but we can't really blame ourselves for our natural programming. And I know this is harsh of me, but changing yourself is far easier than changing humanity, and that applies to all addictions and mental problems.