why do people/game journelists keep calling mario a casual game?

[Pyro as Bill]

Mario Kart DS/Wii, Wii Sports, Wii Sports Resort, Wii Fit/+, Wii Play, Brain Training, NSMB DS/Wii, all arcade games.

Nintendo could have exited the console race and singlehandedly resurrected the arcades instead.

Story games or '10/10' games aren't arcade games. They're 'computer'/'hardcore' games.