why does the Bankruptcy Code provide that student loans should not be discharged unless there is a showing of undue hardship?

why does the Bankruptcy Code provide that student loans should not be discharged unless there is a showing of undue hardship? What argument can be in favor of allowing a student to discharge their loans? Do you agree with the Obama Administration's or the Trump Administration's approach to loan forgiveness?

https://www.nytimes.com/2018/11/11/business/student-loans-betsy-devos.html