She reckons that she diets and exercises but still can’t lose weight.
Just because she believes that does not mean it’s a reality. She most likely still over eats and exercises too little, even when she thinks she’s doing the opposite
From what I’ve seen the need for gastric band = addicted to food and no ability to self control what they eat.
An unfortunate situation to be in. I know someone with one, seen them pile food high on plate and then only be able to eat a small amount because of the band. If the band wasn’t there they’d go through the lot and more.
I also agree with the causality not being clear cut. E.g. something like a knee injury -> less exercise -> slight depression -> comfort eating -> put on weight -> knee problem gets worse due to weight -> more eating……