Why simple doesn't have to be a soldier?

Simply speaking, you don't have to be a soldier, depending on your personal interests and career planning.

In some countries or regions, such as the United States and China, citizens need to perform military service for a period of time. In other countries and regions, military service or part-time military training or other national defense obligations may not be required. Therefore, it is uncertain whether simple people will voluntarily choose to be soldiers.

However, even if there is no formal military experience, some specific occupations and positions may require certain military skills and qualities, such as some special industry personnel or government agency staff. So whether you want to be a soldier or not should be judged according to the specific situation.