Data drives me to do better.
That should be the takeaway lesson from this study. Just because some people stuck their fingers and gathered BG numbers three times a day does not mean they acted on that info to change their health. Until health pros make this clear to patients, that they need to actually use this info to adapt their lifestyle on a daily basis, there's simply no point in gathering daily info like this. And certainly not at a frequency of 3 or 4 times a day.
Once you've dialed in your lifestyle into regular eating and exercise habits, repeatedly gathering daily numbers is redundant overkill. Gathering BG numbers no more than one day a week should suffice, just to confirm you remain homeostatic.
Gathering info, by itself, changes nothing.
(BTW, I've had T2D for 15 years now. So I've walked the walk.)
When we're talking about diabetics and blood sugar, one data point could be the difference between life and death.