I would like to know why you think this
Valve: "We were going to give you Half Life 3 but we decided to let you mod Half Life 2 instead"
Wii Uers: " Amazeballs"
SMB Fans: "Go fuck yourself"
Given that Nintendo is built on Super Mario Bros, some of us expect environments/game-play/soundtracks/production values akin to what it's overhyped, crappy, spinoff (3D Mario) gets.
Neither Mario Kart or SMB get the treatment they deserve compared to the 'fat, crappy controls Mario' that isn't even a real Mario game.
Don't Play Stationary 4 ever. Switch!