I think it's just meant to get your grandmother to play, while you use nunchuck analog stick control.
Edit: like Null says, that comment was just stupid. You don't want some noob beating you, but I don't think that will be the case. Actually I played MK: DD on the Cube today with a friend and we were talking about how the handicap was cool because it only effected weapon quality.
Super Mario Galaxy at the moment.