No one wants to die, of course, but be comforted knowing that when you die, your student loan debt dies with you. Your heirs, spouse, parents, etc. don't have to pay back your loans if you die beore you've paid them off.
If you are disabled according to federal government standards, and receive government disability payments, then you generally can have your student loans discharged. You need to go through a formal hearing for this, and you need to have documentation showing that you cannot work.