Is there? The study you quoted suggests the opposite. The drug doesn't directly cause fat to melt off. The fat is lost by eating less. Why is the control group eating more? lack of....
Shame on you and your lack of willpower!
Biological urges are powerful, don't be so quick to judge.
Because they aren't taking an appetite suppressing drug. It's easier to not eat when you aren't hungry, so it's easier to lose weight with the same amount of willpower compared to people that aren't taking an appetite suppressing drug. Willpower has no part in the study, it doesn't "suggest the opposite".
The drug does not remove fat. It removes the feeling of hunger. Assume both groups have little willpower (they are fat after all). The control group feels hunger and continues satisfying that hunger with food as they have no will power. The group with suppressed hunger from the drug also have no willpower, but since they feel no hunger they eat normal amounts.
Crime is solved by just not commiting crimes. BAM I just solved crime.
Drug problems is solved by just doing less drugs. BAM I just won the drug war.