First he creates dissent towards luigi leading to the downfall of luigi and the subsequent "evil" luigi in mariokart. Now he's working on his propagande campaign against yoshi, presumably to create an evil yoshi army for the bowser ranks.
I'm a PC gamer, never had a console so to me joysticks on controllers always seemed like they'd follow the same control scheme as planes had. That being said, when i bought steam games that I consider to play better with a controller and I bought a 360 controller to play them with, I never once changed the control scheme to inverted. Because honestly, the switch isn't that hard and I'd rather not waste a few minutes adjusting control schemes everytime I play a new game.
In the end it doesn't matter to me one way or the other, lazyness conquers all.