Vast majority of publications state that falsetto regards to males only. Is not it similar to this matter by any chance? Why do you even mention the female falsetto in the article if everyone say it is in male only, if Miller says it is nonsense to talk about it? Not trying to provoke. Trying to understand what makes you delete the info about vetricular folds falsetto, or unbreathy falsetto for the only reason it is sourced not as often as your flexed not fully closed vocal cords breathy one.