Totally understand...and glad he saw it...I feel ya....it's damned frustrating! That's what drove me to the revision. At first my hubby didn't understand...he assumed I would be like him. He insisted it was a simple matter of calori's in, calories out. I explained it to him and then went "back to basics"....he either saw or I showed/told him everything I put in my mouth for several weeks. Pretty much 700-800 calories a day...all protein and some complex carbs in the form of green veggies. All except one day where I had a few bloody Mary's. At the end of that experiment, I had gained two lbs. he said ok, I'm convinced. Your metabolism is broken and you need the surgery.
Back when both my husband and I were trying to get surgery, one of the steps we had to do was a food log for a month. We had almost identical meals, as most of it was at home...except I left off many of the carbs he had. He lost 5 lbs that month, I gained three. The dietician we were seeing at the time told me I wasn't eating ENOUGH carbs...and this one seemed to understand that I was doing my best to control carbs due to my insulin pump.
This was for his surgeon who I was also WANTING to use. MY insurance company said yes to the DS but no to the surgeon as he wasn't in state. And we FORTUNATELY had a DS surgeon, several actually in state. But most either were not in network OR they refused to do a DS on a lightweight. I got lucky with Dr. Boyce in that he was willing to do the DS on a lightweight.