Alcohol alone, without alterations of Vitamin B1, can cause peripheral neuropathy.
I have also been a nearly daily social drinker until recently. At least one of my providers felt that this was most likely the cause of my PN. Others have almost scoffed at the idea, considering my level of alcohol use.
Soon after my diagnosis, I completely abstained for several months. Nevertheless, my PN was progressive. At this time, I drink a glass or 2 of wine nearly daily. The PN continues to be progressive.
My take is that no one knows precisely the amount of alcohol necessary to cause alcoholic PN. Furthermore, I believe once the nerves are damaged, from whatever cause, it is unlikely they will heal.
It's the individual patient's call, whether to give up or reduce your alcohol intake. If you do, you may be limiting the progression of the disease. The down side is that you have to give up drinking, without really knowing if it makes any difference.
As with almost everything about this maddening disease, its confusing.