Plus there's the risk factor. If you fuck up distillation of alcohol, even slightly, people may die.
You get the temperature control on your distillation wrong by 3 degrees, people will get sick from drinking it. 5 degrees, and it may kill kids who happen to get a hold of it, and starting at about 8 degrees it gets to the point where 2-3 glasses of your homebrew whiskey will kill a full blown adult.