I stopped reading when it said Wii Fit wasn't a game. It's one of the gamiest games I've ever played.
Edit: Finished reading. Anyway, the people who complained about Wii Fit being on the sales charts were complaining because they didn't like it, not because it isn't a game. For proof, these same people complain about NSMBW not being a real game when it sold well.
"Now, a fun game should always be easy to understand - you should be able to take one look at it and know what you have to do straight away. It should be so well constructed that you can tell at a glance what your goal is and, even if you don’t succeed, you’ll blame yourself rather than the game. Moreover, the people standing around watching the game have also got to be able to enjoy it." - Shiggy
