You ate pizza, pasta, garlic knots, empanadas, redbull and more pizza and blame carbs for your bloating?
My conclusion though, is whatever gets people to eat a bit less and a bit more varied diet is worth it. If they have to believe in spurious causality and it gets them to binge less on garbage, that’s still a win.
Personally, I lost 50 lbs through a combination of exercise plus homemade vegetable/fruit juice replacement of two meals --which would be high carb. Some people would not be able to deal with that so it wouldn't work for them.