Dude, the mortality rates go up at least linearly, maybe super-linearly, to weight over a certain amount. It's not like some mythical / hard to read / later benefit. This is a drug that radically changes those risks NOW, really quickly. It's a different matter than aspirin (helpful if heart disease is a real risk, otherwise no) or wine or smoking, both of which people have a strong interest in thinking of as good for you.
Yes being overweight is horrible for you. But fixing it with a pill that you don't know the long term effects of and not actually fixing the root of the problem. Why you gained the weight in the first place. Is helping no one. If anything you could be fixing something in the short term and causing long term harm in the ladder.
The list goes on forever. I'm betting this ends the same way.