Another 2 reasonings against lip-syncing in live vocals' favor
-how can an autotuned lip-sync properly convey a singer's emotions as she is currently performing on the stage?
-lip-syncing =lack of confidence in one's voice. Sure, Kojiharu ain't no Masuda Yuka or Takamina, but she's at least confident & proud enough of her own voice that she sings live
shame this is lost on lip-syncers like SNSD (Jessica is a great vocalist, are they so lacking in confidence of their own vocals that they had to resort to stooping that low?)