In many aspects, the hiring process is similar to a game of poker in that each side is trying to gather as much information as they can to determine when they should bet and when they should fold. Organizations who allow untrained interviewers to conduct unstructured interviews are creating an environment where the candidate has the upper hand.
Asking poorly developed interview questions is really no better than playing a poker hand blind. And the worst part is that the interviewer (or poker player who is playing the blind hand) believes they have enough information to make a good decision. This fact creates an environment where organizations continue to ask the same bad interviewing questions and also continue to make poor hiring decisions.