alt Hacker NewsI think there's a few factors at play:
1. People might want to help, but they don't think taking a pill every day for the rest of your life is a proper solution. I'm not aware of any such things for other addictions you mention,
2. People don't want other people to have it easier than they did. "I had to diet and exercise etc, you should too",
3. People don't want to help. They want other people to be fat because it makes them relatively more attractive.
re: 1, there are plenty of people who take some medication at some interval for most of their life. People with ADHD, people with type 1 diabetes, most women, ... why do we find that totally unproblematic, but as soon as it's medication to help with obesity (which is a serious medical condition in its own right) it's suddenly such a big problem?
EDIT: And to be clear, there may be specifics with these particular drugs which are problematic, maybe they're by necessity expensive or resource intensive to manufacture, maybe they have problematic long-term effects, I don't know. I'm purely talking about the general aversion some people claim to have regarging taking some medication on an interval to help with a health problem. It makes little sense to me.