Discharging student loans in bankruptcy means you get to pick up the tab. Plus the rest of the taxpayers.
We pick up the tab more if these students default, are saddled with judgments they can’t possibly pay, and cannot get decent work as a result. This, along with the huge losses caused by their unpaid and unpayable debts, will be a body blow to the economy that will dwarf the 2008 mortgage debacle. Besides, debt is debt. It’s just not right to have some kinds of debt undischargable (save for debt caused by willful torts like assault, etc.). Best to have them cut their losses now and be done with it.
If student loans are non-dischargable there is no reason for the loaning entity to not make careless loans.