[melling]

Yeah, it's pretty common for someone to explain why the keyboard is a better input method. And you're right it probably is at this time for healthy developers. However, you should probably stop to consider that the solution isn't for you. It's for people who can't type. Many people have disabilities, for example. This opens up a new world to them. And as for the author, he suffers from RSI, as do many other developers.

http://ergoemacs.org/emacs/emacs_hand_pain_celebrity.html