Why do many employers always limit their age to 18~35 when recruiting computer technicians?

Because people of this age have little social experience and lack of experience, it is easy to try to give some benefits. Plus, they are young and strong, and they can work overtime to get more surplus value. Anyone who doesn't listen can find a reason to be fired. Older people think more about reality and are not easily encouraged. There are more, but the boss is not easy to control.