One reason: training is a kind of welfare for individuals, which is of great help to improve our skills and knowledge.
Reason 2: In addition to personal time and energy costs, the company has to pay training fees.
Reason 3: The purpose of the law is to make the society develop normally and better, and the training provided by the company is also based on this. It doesn't matter if you don't have some abilities. If you want to be promoted in the future, it is hopeless to change jobs. You can achieve this through training.
Of course, you also have the right to rest, but in the real society, our life and development are a process of constant exchange, and our efforts can make us pay back.