Modern industry requires specialized people in specific areas. For example, some technicians are specialized in a single type of machine, so they know how it works and how to repair it. These technicians travel around the world fixing this single type of machine and work for the company that produces them. Thus, the benefits of this type of training, education and choosing careers are: human capital improvements, which means a better skillet for workers, increased labor productivity, because they are specialized in a single task and can focus on it, and more valuable workers, because it's less likely they'll fail.