This loan, called student loan, aims to help students from poor families have the money to study and not give up studying. The tuition fee for graduate students is at least 10 thousand a year, and some universities may be higher. In this case, poor students can alleviate the financial pressure of their families through student loans, so loans are very necessary for poor families.
If your family can pay for your graduate school and the pressure is not great, then a loan is unnecessary.