I have a theory about diet soda. The sensation of sweetness signals that the body is going to receive nutrients. Fake sugar fails to deliver on that promise. The body responds by increasing hunger to compensate for the poor quality of the harvest. The cycle of hunger, lack of true nourishment, and instant gratification spirals out of control.
Just observation by middle aged RN. Size 2.
Except sugar doesn't nourish.
I agree with the poster upthread who said that sugary drinks are too sweet. I can't stand them. I drink plenty of water, but I also like my diet Mt. Dew. And I'm not fat.
Even if it were true that diet drinks trigger hunger, the decision to eat or not rests with the individual; the drink itself doesn't bear blame.