Because as a salesman of an insurance company, he only sells various insurance products of the company. The more products he sells, the higher the commission. If you don't sell products, there will be no income.
Most of this job depends on contacts. When people are exhausted, it is impossible. In fact, it is to earn money from acquaintances, and the company will make a steady profit. Therefore, it is of course true that insurance companies have been recruiting insurance salesmen for many years.