You are a little out of touch there, idol has at least nine of the winners who have won awards and at least three are touring to sold out venues, Here are a few:
American Music Awards(AMA) Billboard Music Awards(BMA) Kelly Clarkson
(Season 1, Winner) 4(AMA) 12(BMA) 2(Grammy)
2006 Best Female Pop Vocal
2006 Best Pop Vocal Album Clay Aiken
(Season 2, Runner-Up) 1(AMA) 3(BMA) 0 Fantasia Barrino
(Season 3, Winner) 0 3(BMA) 0 Carrie Underwood
(Season 4, Winner) 5(AMA) 14(BMA) 3(GRAMMY)
2008 Best Female Country Vocal
2007 Best New Artist
2007 Best Female Country Vocal Chris Daughtry
(Season 5, 4th Place) 4(AMA) 6(BMA) 0
Best new Group Jordin Sparks
(Season 6, Winner) 1(AMA) 0 0 Jenifer Hudson
another non winner - 1 Oscar win for Dream Girls
My kids listen to and for crazy over Chris Daughtry whose band just won "best new group" in 2008.
Carrie Underwood is the top selling money making country singer right now
It goes on and on and even one contestant that did not even win idol won an Oscar, Jennifer Hudson.
I have 6 kids and the kids are the ones listening and the reason I know these groups, but far more than one Idol has made it and made it big.