I just got in an argument, because I said he sounded like the man he is, and my acquaintance said he’s not trying to change his voice. There is surgery to change your vocal cords?
I think there is just coaching to try to 'feminize' a male voice for inflection and mannerism, but the vocal chords are far too intricate and dicey to do completely 'cosmetic' work on. The risks are too great.
I have heard that they do shave down an Adam's apple, though, for appearance sake.