Sure, and the "woe is me" rate is estimated between 0% and "why don't you fire up that bong again" -- much lower than that of the (formerly) wealthy students that gambled on an expensive education.
The difference is who takes on the risk. With startup investment, the investors risk their money, and if the company dies, the investors take that loss. They do this because they can make a lot of money from the startups that make it big. With student loans, the risk lies with the student.