Back in 2008 when I was hospitalised for a week with severe food poisoning, my BG was checked every two hours, 24/7. I had such sore fingers at the end of the week, peppered with tiny bruises !
My GP told me that for T1s, testing makes sense because they (you) can adjust insulin to match carb intake. He said that the danger with T2s testing is that patients can get obsessed with numbers and frustrated and depressed because we aren't able to react to high BG like T1s unless on insulin. However, he does think that some testing is useful, for example, after introducing new foods, changing meds, feeling ill.
I tend to do spot checks, randomly at different times of the day over say a week or two, to build up a pattern. If there's a problem, I try different ways to overcome it. I don't religiously test every day, because my fingers would get too sore.