I would agree that to keep the body fit exercise is necessary. However, many have lost weight without it because FOOD INTAKE causes weightloss, not exercise.
Cardio is good for the heart
Strength Training is good for lean muscle (which burns fat like crazy)
Eating Healthy is good for weight management.
A culmination of all three forms a good habit and plan for being healthy.
It is not okay for an alcoholic to get drunk once in a while.
So do not tell a food addict it is okay to eat like sh*t once in a while