That drifting thing with Ken is a better answer than what you'd get from a large proportion if you asked what is WRC? World Rowing Championship? Women's Resource Centre?? Wookies Raped C3-PO? They may know what rallying is but that doesn't mean they know anything about it and certainly doesn't mean it's popular or successful, I know who Rebecca Black is, does that mean she is a well liked and high quality music artist?
Face the fact that you're in a minority so you can stop whinging about it, we can all see why you don't want it in the game, but if nothing else you've given reasons why Codemasters would put it in the game. Dirt has probably sold more copies then people downloaded the FREE WRC demo and purchased it combined, competition rallying is becoming a niche sport now and by adding mainstream attractions Codemasters are driving themselves and improving their own performance.
Gymkhana as a sport is not very popular in the same way, it's not televised much and so on, but it gets way more viewers on those Ken Block videos (and check the video stats it's getting most in Europe and all of America, the continent and yes that includes your own country infact it's Asia and Africa as a whole who don't bring the views). The 3rd in the series is the 3rd most viewed in it's category of all time, I challenge you to find a rally video even close.
Younger generations will learn more from Dirt 3 about rallying and off-road racing from it's car to the nature of the sport then they probably have in the last 10 years, and if they're attracted in by gymkhana and it helps feed in more popularity to roots rallying then I see no reason to be so hateful of it.