It did not realize how important the quality of one’s voice is until my friends told me the following 2 stories.
1) A young lady in her mid-20’s has difficulty for being taken seriously at her work place even though she is knowledgeable in her field because she talks like a 12-year old girl.
2) Another lady has quite a nasal voice put some people off because she comes across as a nagging woman even though it may not be the case.
I am not a voice expert, but I think having an unprofessional voice can be a disadvantage. It is the subconscious of audience that one is fighting against and that is difficult for the audience to change.