The same reason a shooter can be great without having a racing minigame.
" I don't get it. The reviewer admits that the story takes a backseat, a flaw in every mario game and galaxy 1. How do you make a perfect game without a good story? "
Am I the only guy who thinks the video review of this sounds like a dude reading of page he just got handed randomly. Sounds like me when I had to do book reports in school or something.
Also Mario Galaxy is pretty sweet, pure gameplay, in the end that is all that matters."
All Gamespot reviews are like that. They are like product descriptions.