To be the best racer in the world, you must train. You must learn the ins and outs of the track, the hairpin turns, and the bumps and grooves of the road. How does one accomplish this?
Through gruelling and relentless repetition.
Turn 10 Studios' Forza (and other racing games) are built on the player's ability to not just customize a car that performs under any circumstance, but understanding the track and being able to win against themselves. The beauty of racing games lies in the player's skill improving with experience and practice - just like reality.
With vehicles that now almost perfectly reflect their real-life counterparts, and replicas of real-life tracks available in-game, you can be the winner of Bathurst without leaving the darkness of your home.
But, it doesn't matter if you have the fastest car money can buy. If the driver isn't prepared and doesn't know the track, it can throw the entire race. Ask any real-life racer and they'll tell you that studying the track by driving on it countless times is the way to victory. When you improve your run time by something as incredible as five seconds, you'll grow to respect the repetitive nature of Forza.