I totally get why it's so difficult to challenge medical professionals, they have so much power over our lives, particularly if you live somewhere where you don't have the option to switch surgery. Or for people for whatever reason are not in the right place to do so, mentally.
I've had to learn to manage my own health and not rely on medical professionals because of the times I've been bullied, misdiagnosed, given the wrong advice... I spent my childhood and young age thinking I would die young...but it wasn't true.
My GP prescribed metformin which I agreed to at the time but then I decided not to take it. I'm not just being stubborn refusing to treat my diabetes, I want to give diet and exercise a go but I will take metformin if BG doesn't go or stay down. When I have my review in February I'm prepared to justify my decision and not take any BS from whoever I'm seeing (in a nice way, I'll agree with whatever they say and just tell them I'm trying my way first).
To make it absolutely clear, I'm not telling anyone to stop taking medications. I know what I'm doing, I test myself several times a day, if my average BG wasn't going down I would be taking meds. I just want to share my experience.