Why are interviews used so often in reality shows?

Why are interviews used so often in reality shows?

Richard Hall (Reality TV Producer) gives expert video advice on: What do reality show producers hope to get out of an interview?; What makes a great reality show interview? and more...

Interviews take the place of narration. The less narration you see on reality shows, the better, the more real they feel, the less produced they feel, the less like documentaries they feel. Narration is antithetical - it really needs to be kept to a minimum, especially if you have a host already. What you really want to do is use the host and contestants. Basically, they should all tell the story.