Why are those modes "better" than voice?

Seems that a voice conversation, under almost every circumstance, would lead to a richer exchange of information and better interperson understanding than either Morse or "data" modes. Voices naturally convey emotion and mood, allow an almost continuous range of emphasis, and can use different inflection to add subtle but important syntactic variations to many words. None of this is possible in Morse or "data" modes, except in some very crude ways such as emoticons.

The Man in the Maze
QRV at Baboquivari Peak, AZ