Some go in because they care about holding life and death in their hands. Others go in because they are fucking lazy and nursing is easier than becoming a doctor or orderly or doing about anything else. Until they realize that a nurse basically runs the wing/ward and they have to do more than sit on their asses and talk to their friends, and then, they let just let patients die.

Some go in because they like the field, though. Very fucking rarely. Like all things.