the wii mote doesn't have two analogs. well thats what i can think of really.
True -- I have both PS2 games and love the tank-like controls (http://en.wikipedia.org/wiki/Tank_(arcade_game)).
But you can accomplish something similar with tilting motions -- as Namco has done with the iPhone version (which I have demoed).
So it may really just be a development choice -- though one that probably has a company leaving money on the table.
Mike from Morgantown