My GP practice does not recommend blood testing as it only shows the current BG level.
They go by Hba1c testing as more reliable.
He means he does and he is not alone but, many disagree. My GP told me that I did not get enough test strips and doubled my prescription. My DN said I didn't need to test at all.
Every year there are papers published such as:
A1C Versus Glucose Testing: A Comparison
He may not want you to test your plasma glucose simply because that means giving you a prescription for test strips and, if he is a 'with profits' GP Practice, it costs him money.
Testing however is extremely useful for working out what foods you can eat and what foods you should avoid and just as important, how much you can eat of a certain type of food before it impacts on your BG level. Testing is a useful tool if used thoughtfully. Most GPs simply assume that you can't interpret the data, will panic and will be making endless appointments.
Your body needs about 220g of glucose per day. It produces it from the carbs you eat. If you eat less than that, your body will create its own glucose from non carbohydrate stores. Slowly you will lose weight and, for most type 2s, this is a good thing as you start to lose it in the liver and pancreas. If you combine it with exercise, which helps improve insulin sensitivity and also helps reduce your blood lipids, it is highly beneficial.
Phrases such as 'a third of your meal should be carbs' are just meaningless soundbites. There is a massive difference between the carbs in chickpeas or lentils and the carbs in treacle sponge and custard. One takes ages to digest and the other goes straight into your bloodstream.
Generally, health practitioners are worried about faddy diets. They worry about people eating too much fat and not getting enough fibre but they don't have the time to explain it all to you. The fat on chicken meat or in fish is very different from that on a cold joint of lamb or mutton for example. Artificially constituted hydrogenated fats are completely different from natural fish oils.
I have 2 red meat, 2 poultry, two fish and one vegetarian days per week. I always aim for low GI but sometimes have medium GI carbs and always try to stay below 120g per day. My favourite carbs are wholewheat noodles, wholewheat pasta, converted brown rice and pumpernickel. I also eat wholegrain rye and whole grain wheat mixed breads but only from trusted sources and only in limited amounts. I also eat lots of chickpeas, various beans and lots of lentils. Although 'carby', they are quite different. The type of carbs in thee only get partially digested.