Yes. I speak as a T2 diabetic (diagnosed 2 years ago).
Because it will identify foods that cause BG spikes (which many people see as damaging as long term high BG readings). And it acts as a sanity check for when the condition changes (as it does fairly frequently).
No. The HbA1C tests the average over the last (roughly) 90 days. It doesn't test highs - just averages.
Not so. For example - my diet hasn't changed recently but my BG readings almost doubled in a week. I wasn't ill and hadn't started eating anything new. If I hadn't been testing frequently I'd not have spotted it until damage had been done. As it was I was able to get an appointment at the GP and get something done about it. And the solution was that (for some reason) my medication had ceased to be effective and I needed to take more.
Really? You might not care about the small amounts of damage that spikes do but I certainly do! And I have no intention of losing my sight or having my legs amputaed - both of which have happened to people I know who have diabetes.
Phil.