I don't recall students spending long hours to apply for a part-time job, it is usually the long hours that they work. Your arguments are also very confusing to me.
Ok, thank you :) This is my mistake. I'll fix it later, in my essay.
They cannot learn enough social skills from their university life
They often have group projects that require them to work together in groups for a long period of time. You need to elaborate on "social skills" for working in society.
Social skills they gain from university isn't enough. They may be called 'soft skills'. I'm a student, and I am also taught many skills to communicate, present and talk. But these skills cannot make me feel sefl-confident when I really make a public statement. I think that I need to practice more in real life rather than only in university.
Thank you for comment!