Or most the fact that a lot of people don’t eat when they’re hungry so much as when they’re bored. And some don’t realize the difference between eating until you’re full and eating until you’re stuffed. “Full” would be having your hunger sated and you get up from the table and you’re fine. “Stuffed” is when you groan and push your chair away from the table, your stomach hurts from everything you ate, and you end up feeling like crap.
I’m guessing once he gets out of the habit of feeling “hungry” all the time, he’ll feel a lot better. Either that or fill up on veggies if he’s that hungry.
That particular procedure comes with a higher risk of malnutrition due to its malabsorptive aspect, which I think is particularly risky in a child who already has a poor diet, nutritionally speaking. Particularly because the child’s body is still maturing and vitamin deficiency is potentially very dangerous.
Additionally, surgery doesn’t teach the child sensible eating habits which is particularly necessary when your body is not retrieving all the available nutrition out of the food you can intake. I would think a sensible physician would not qualify a patient for surgery who isn’t old enough to understand lifestyle changes required of the procedure and its very real health risks such as hernia, infection, bowel obstruction or perforation.