I was a machinist, and mold maker for many years. I found out why molds are finished off by hands. Machines will do things mathematically correct, but they do not look right. When parts, like model cars, airplanes, have molds, made, sticking pure math, the models would not look right. This is because certain things do not scale up mathematically. This goes for aircraft, real, or models, and a lot of other things.
Snake's human touch is what makes his models so believable and presentable, and realistic. IMHO