I have neuropathy and am not nor have I ever been diabetic.
DI found that different things can cause it. Alcohol use, medications, over-the-counter drugs, etc.
At least he is no longer having to avoid having honey in his tea.
One thing I have found out about doctors as I have gotten older is there are some that listen to your symptoms and try to find a cause. There are others who try to make your symptoms fit into their "disease of the week" and nothing you can say will stop them.
Best to walk away and find another doctor.