Dear WW: So far as I know, there are only conflicting theories about cause of rhinophyma. I don't know the other
two people you mentioned. So many formerly mysterious things have turned out to have a genetic component, it wouldn't surprise me if rhinophyma is one of them. The Internet has many sites about it, but I just don't have
energy to fight my way through them. I couldn't even find
a good picture to cite.