So you state something as fact yet don't actually have the expertise to understand if that's even true? I'm not a medical doctor, but it seems fairly reasonable to me that people with diabetes shouldn't arbitrarily and radically change their diet because of an article they read on the internet...
If you believe most doctors have expertise in nutrition and fasting you've not been paying attention.
It seems fairly obviously no one should arbitrarily and radically do anything just because someone told them to. There are a lot of special circumstances, but thankful there are useful concepts such as personal responsibility and common sense that have generally been useful in keeping humans alive for quite a while.
It's risky if you shoot up insulin every day, or take other drugs that have an effect on blood sugar. You could wind up in a hypoglycemic coma and die.