Today people are still buying hand-made portrait paintings. They could easily spend x10 less and take a photo or hire a digital painter. However, they still choose the old, irrational way.
The process itself is the value. The years spent mastering the little things is the sacrifice that makes it valuable to the costumer. In return, the chef follows the path to satori by sticking to his chosen kata, the way. Japanese work ethic is deeply rooted in the zen tradition.