Eddie,
It's still not an acceptable risk when there are other less risky methods of controlling blood glucose levels. Like the low-carb diet lots of people on this list seem to swear by. I personally don't think the prescribing millions of people something known to be risky and could cause death within a very short space of time is a good idea. I know hypos can kill and very quickly too. But I can't see prescribing what I don't believe is a 'very mild' drug, or any drug for that matter, to be 'on the safe side'. Not even asprin, according to some in the medical world. The same basic 'do the benefits outweigh the risks?' scenario.
I take an antiepileptic, which has completely controlled my seizures for over 10 years. But my neuro hasn't advised me coming off them - the benefits outweigh the risks. And the side effects aren't lovely at all! Other people have trying successfully coming off the med after a couple of years. It's different for everyone, as are the side effects up to a point.
Also, you can't deny that killing off your gut bacteria is a good plan, as Janabelle has experienced.