Is "The Voice" bogus?

So all these "regular" people are given an opportunity to sing in front of the famous judges and they are chosen based solely on vocal ability. Sounds like an entertaining concept right? But is if fair that Dia Frampton was already in a signed band (Meg &Dia)? I thought these people were supposed to be undiscovered? In addition, she was portrayed as having "stage fright", but her band played Warped Tour in 2009? If she's so "shy" and "scared" then how the hell did she preform in front of all those people on the tour? Maybe I'm just naive in thinking that the show was actually unearthing hidden talent when it was more than likely just boosting the judges careers and feeding us a false rags to riches story.