Was she an endocrinologist?
I would expect a consultant endocrinologist to be a bit concerned that a hba1c of 4.7 might suggests problems with hypos and to ask questions about whether you have a lot of hypos and whether you have good hypo awareness. If you can answer no (no, you aren't spending a lot of time hypo) and yes (yes, you do have good hypo awareness) to those questions then 4.7 is a flipping excellent hba1c and you should be really exceptionally pleased with it.
Unless she was mentioning the risks of diabetic complications in passing in terms of the need to keep up the good work with yOur diaBetic control, I can't see any specific reason why your hba1c result in itself would have indicated a particular need to discuss the risks from high blood sugar levels. Do you have any signs or symptoms of complications? Do you keep up to date with annual retinopathy/foot checks/kidney bloods?
Blood sugar levels in everyone, type 1, type 2, non diabetic are indeed moving all the time. If you have a blood sugar level that is completely static, you are probably dead. So yes, she was wrong in saying that sugar level in type 1 patient shouldn't move. But perhaps she was just wrong in the way she presented it? Glycaemic variability (so how big the swings up and down are) is a factor that increases diabetic risks and carries its own risk of damage. The aim should be to try and minimise the swings so that your standard deviation is less than 3 (or possibly even tighter
@tim2000s ?). That is easier said than done. I would expect that if a consultant endocrinologist was concerned about a patients glycaemic variation they would have a chat about ways to reduce the variation (that might include looking into the timing of your mealtime bolus to try to soften the peaks, looking into the causes of any hypos to try and avoid them, looking into a period of flash glucose monitoring or continuous glucose monitoring to investigate any patterns to the swings).
I don't know about changing doctor. But if your consultation has left you with queries, why don't you get in touch with your doctor and ask her for further help in explaining? They should copy you into the clinic letter and you could wait till you get that and then send her some follow up queries?
Why are you thinking of eating unhealthy food to raise your hba1c? The only reason you might want to think about raising your hba1c is if you are getting lots of hypos - and even then, the aim isn't to get a higher hba1c, the main goal would be to reduce the number/severity of hypos and you would be putting up with a consequential hba1c increase because of the benefits of avoiding the hypos. Eating more unhealthy food wouldn't help you to avoid hypos.