Forgot to address this: If I am not mistaken it is not eating or smoking that causes the loss of limbs--it is the disease and that sores do not heal and gangrene sets in. I say, let the poor guy enjoy what little he has left.
A lot of disease, esp. diabetes is caused by poor lifestyle choices. A lot of diabetes can be reversed and life improved by altering one's food choices. A person doesn't have to be a granola cruncher but things as simple as cutting back on white bread and sugar and drinking less soda will do wonders for a person's sugar count. Sixty isn't even old but he sounds set in his ways and is typical of the mentality of poor people who have food as their chief enjoyment in life. I suppose a lifetime of diabetes drugs is his future. I work with diabetes patients who have open sores and the whole bit. I can't imagine why someone would WANT that for themselves.