Part-time job for university students

Have you ever had part-time job? These days many students are working on the job, especially university students. How do you think about it? Is it good or bad? There are several profits with part-time job. First of all, young people can learn the difficulty of earning money. Especially in Korea, parents are devoted to their children.
So they want to give everything to their sons daughters. Students have to know their parents’ labor. And though part-time job, students can experience various people and relationships. It will be helpful for their future careers. And they can learn skills, too.

But there are some weak points to a part-time job. University students have to have study hard. If they work hard on the job, they will be tired. So they can’t concentrate to their study. Moreover they will be taken away for a lot of the time on the job. If they get the lower grades, a part-time job is not good to students. Does this job surely help their careers?