Because risk is a time function, not static. If credit providers approved credit at one point and time and never reviewed or limited it, they would be exposing

Because risk is a time function, not static. If credit providers approved credit at one point and time and never reviewed or limited it, they would be exposing themselves. Your example (car loans) have time limits and contracts that account for risks in the time limit - the longer the time limit, the more potential risk. Credit on the other hand is ongoing.