Because there is no legal requirement to test before driving if on tablets, that’s clear enough to me but many on this forum scare those on tablets that can cause hypos into thinking they have to test before driving a car. They don’t, they might choose to, they might use it as a reason to ask their GP for more test strips, but ultimately they can legally drive without testing on tablets and if they can’t get prescribed or personally afford test strips they don’t need to stop driving.
Of course personally I always test before driving, I take 5/6 injections of insulin a day and have signed to say that I will test before driving. I don’t drive much because of my ME (which I don’t even have to tell the DVLA about).