Maybe it does. People eat too much because they have cravings, low pleasure response to food (so they need to more to feel the same as healthy people) and maybe low dopamine levels (that's my hypothesis based on my problems and some experiments).

I think eating too much is a symptom of an underlying problem and drugs may help with it. This is also why I think regular exercise is very important for weightloss. Not because calories burnt but because neurotransmitters levels and their impact on mood and impulse control.

>>So if your friend have counted calorie counting without losing weight she didn't count correctly or truthfully.

She very likely knew she is eating too much. It's not rocket science and calorie counting won't help unless you are in very deep denial. The problem is controlling yourself and constant cravings you have to fight. It's just way more difficult for some people than others the same way some get easily addicted to drugs and some use them recreationally for years without problems or sign of addiction.