Just to clarify...those extreme examples used by Kardashians and others are just that.. extreme. Alex Wagner sounds like she got 'it' a few years ago in school, but is now just trying to sound like a 'perky', 'with it' educated young woman...leading to residual vocal affectations that even she is not aware of.
What I wonder is IF network executives who choose these women are aware of the vocal issues, and (intentionally or not) lean toward those who exhibit a trendy sound.