With a signiature of "Live fast. Die young." do you really need to ask what motor sports is about?
It's adrenaline.
Motor sport caters for a band of thrill seeker which for the most find other spots too tame, drivers at the top of motor sports are the modern day gladiators and in a way, it's become too safe and too health & safety orientated.
One of the biggest thrills of my karting carear was taking Rye Houses Stadium Bend in a Formula C. Now it's tamed with a huge run off it has become a high speed technical corner that is utterly mundane.
I race become I love adrenaline, I need more of it, and I just cannot get adrenaline hits doing more traditional sports. Motor racing gives me that all ellusive shot, and i'm a junkie.
For me as a spectator it's more about analyses, but as a driver it's about that split youre on, the car your chasing, the race result, the championship, the overhang of your rear wheel on the broken tarmac verge, the precision of braking, the racecraft of battling, the planning ahead of the backmarkers, the inch perfect line, that extra two tenths, and most of all, it's about the "now".
If racing cars scares you then sit back and admire the courageous, but for those few, it's gladitorial.