No although I neglect the existence of the word of casual gamer... I see your point. But that doesn't make it right haha.
Actually mainstream games sell the best and they are not limited to the "casual" or "hardcore" labeling considering usually they are just a game accepted by both . Ninty will never go full casual because they have too many mainstream games such as Mario and Pokemon that will continue to sell loads more than many of any casual series game they can make.
Now considering your known for bad jokes I hope this is another one or otherwise ignorance is becoming more prevalent on this forum. I'm not defending Wii Music because we all know i'm indifferent to the title, but I'm really getting tired of this beating of the dead horse. Wii Music won't sell as well as Wii Fit and Ninty after Wii Fit has become more focused on their core games so I don't see why this shift would happen... but you probably don't know either.