Bankruptcy is such an alien concept. Adults took out consensual loans from another adult and now they get to just say oops "take backsies"?
It's one thing if you're in a crazy desperate situation and someone takes advantage of you, I could get that. But if you're not desperate and you took money from someone else and can't pay it back? Theft.
The rest is just how we manage to keep that low on an aggregate level in our society that takes care of our own - which we want to do.