Several times over my life I've made something like a leather pouch for a phone, Carved wooden spoons, and of course now wine. Folks see it or tasted it and say "Wow, you ought to be selling that. Problem is for "Hand crafted" things from leather slippers to wine, the time and investment for us is much greater and to sell for a 'reasonable profit' for an individual is just about impossible to do over and over again.
Mass production with machines in the process where-ever possible makes that "cheap" wine available and still be reasonably good.
If you've ever been to Old Williamsburg VA and visited those shops where they demonstrate hand-made musical instruments or furniture... someone always asks - Do you sell these and what do they cost? The answer - "If you have to ask, you can't afford it." They do everything on commission - someone with money to burn wants a hand made item and they don't care what it costs. We as Hobbiest or small business wine makers may have limited budgets but we are much closer to those folks commissioning a piece of furniture or musical instrument than we are to the person going into Ikea to buy a desk.