It wasn't a question of morality - we don't know what the long term side effects are.
Look if it helps a morbidly obese person drop enough weight so that they can get a handle on their A1C, blood pressure, etc. then it's probably (from what we know now) worth the risk. For the slightly overweight person who takes it, and I know a few from the gym, we don't know what that looks like yet.
It will take time to find out if there are long term detrimental effects.
Why? Life is not a morality play.