While this is true, all banks take a cheque as security when extending you a loan (even credit cards). So, if you don't pay the debt, they attempt to cash the cheque and when it bounces, they have the grounds to file a criminal case against you.
There is absolutely no rule that says that banks only file criminal cases if they can't get money from insurance. Banks don't insure their loans, and even if they could, most in the Middle East avoid writing off loans becuase of the impact that such action would have on their earnings.