I cant totally explain it but I'll try.
It started with me when I bought a kart for my son and headed to a local track to compete. I remember thinking, how hard could this be? Its a lawn mower motor with four tires, all "I" have to do is build a better motor. Man, was I wrong! A year latter we won what I call was our first meaningful race. I'll never forget that moment and the look on my son's face, I could see the smile all the way through his full face helmet. We did it together. I set the kart up and he drove it. The air pressure, gear, camber/castor, weight distribution, etc... had to be right and he had to anticipate the green flag, navigate traffic, time his passes and hit his marks. But, we did it, together.
Thats what I see when I watch NASCAR. It's a true team sport. Everyone has to do their part. It is so hard to win a race and you can tell by the teams reactions when they do win. Its a genuine heartfelt reaction. You see these emotions after most every race. Not just after the Super Bowl, the Finals or the World Series. This is the same reason I prefer college sports over most pro sports.