Why aren't any of the winners famous
I'm asking this as a person who does not watch this show but, I haven't ever watched American Idol either and I know the names of many of their winners, even the ones who who weren't very successful after the show like Taylor Hicks and Ruben Studdard. I even know of contestants who didn't win like Chris Daughtry and Clay Aiken, and I know of singers on that show that weren't very good like Sanjaya.
With "The Voice", I find it interesting that it's such a popular and highly rated show and yet I couldn't name a single contestant that's been on the show except for a girl whose last name was Martinez and she always had crazy hair, and of course Christina Grimmie after her very tragic death. The main reason why I am asking is because I know a few people who watch the show and I heard them talking about it without mentioning the names of any of the singers, they just used adjective words like "the really short cute blonde".
What happens after they win? Don't they get a recording contract? Shouldn't they record an album and start releasing music? I'm honestly wondering as an outsider looking in why it is that this show has been so successful but, hasn't created an actually famous singer yet. Why do you guys think that is?