True, but by noting your blood sugar readings over a long period of time, taking note of the spikes, drops, and so forth, you gain some insight into your health

True, but by noting your blood sugar readings over a long period of time, taking note of the spikes, drops, and so forth, you gain some insight into your health and diet. Same thing, here. I wouldn't put much stock into a single result on a single test, but I think there's some broader value to be gained by examining the trend, the fluctuations, and what you wind up as more often than not.