The era of cold weapons has ended, and people are more equal. It is no longer the case that the one with the bigger fist is the boss. Humans have entered the electrical age, gradually replacing industries that rely on physical strength to make a living. In today's intelligent age, it is almost impossible to rely on physical strength to make a living.

Of course, the replacement of old things by new things is a gradual process, and there may even be repetitions. This provides a buffer time for these practitioners who are about to be eliminated to learn new skills and change careers.