Qays, some points:
1) you didn't get my point about business at all. Of course business wants to sell but how do you sell a product? By knowing your customers. Knowing what your customers view as quality helps you sell your product and thus business has to objectively analyze what quality means. Otherwise there wouldn't be any sales 
2) What best selling artists are you talking about? The Beatles? Elvis? 
In case you are talking about Boygroups or something like that: The job of a boygroup was never to make "quality" music but to make little boys and girls go crazy because they wanted to be like these artists or because they wanted to fall in love with these artists. And, wow, they did their job very well so boygroups became famous. The guy who formed the Backstreetboys for instance made it pretty clear that he wanted to put the actual "members" of the band into a new context of use. He was successful because he used different values ("qualities") to achieve this goal
3) No, you are judging Wii Sports by the values that make a good Cinematic game! Again, like Soaps vs Horror movies...
4) Yes, they will have fond memories of Wii Sports. And people like the ones in this thread will have them, too, including myself and my friends. And we're actually grown-ups
Oh and I play Wii Sports Resort over and over again, each time with increased pleasure because I'm actually getting better each time I play it (especially table tennis)
And it's funny that you mention Super Smash Bros because Smash Bros. was always considered to be a shallow fighting game 
I guess you don't like quality fighting games. Oh and you liked Sonic? Wasn't Sonic the game that was tuned down so you could play with only one button?
