It's all really hard work and a winery is likely even more work. You need to always be watching the grapes, you have to hire seasonal workers to pick the grapes (actually not much automation in this area) plus the unpredictability of the weather.
Do you mean geographic area, or grape-picking? Because these [1] are fantastic at picking grapes automatically. Sure you still need a driver, but it's slightly faster than doing it by hand.
