Is it cheap to be a security guard? Many people say it's a watchdog or something. Seek an answer

This is a matter of personal quality. Dogs look down on people. Every industry needs someone to do it. They earn their own labor. There is nothing cheap. They don't steal or rob. Why is it called a watchdog? Because dogs used to be gatekeepers and security guards were generally gatekeepers, it is easy to be associated with watchdog. Nowadays, the quality of people is very good, and there are fewer such people.