Right!!! Deep breaths and just smile.
In the many years of hospital appts and now for my diabetic 2yr old I think that a lot (not all..) of health professionals like to think they know better. Sometimes they will but it's different theory to living with it. (Had a pump start this week and had the rep telling me what it was like having it on for a week, ummmm a week compared to it actually working and having mine for years). Just grin and bare it-it's a lot easier in my experience. Then rant with people that understand!!