Yeah, people do that every morning at 80mph, its called rush hour. And its a hell of a lot more dangerous because the other people out there aren't "professionals."
Of course, in the summer when it's 95F outside, you've got your radio going, the AC
on, and able to just glide along. As opposed to on a track where the air temp might be 125F, wearing a full nomex firesuit, inside a car with no sound insulation, or heat insulation from the 800hp small block upfront. Car temps can reach up to 140+F. Oh, and forget the power steering, automatic tranny, and nice shocks. It has been described as riding a vibrating stationary bike for 3+ hours while wearing a plastic suit holding two 30lb dumbbells at arms length, while someone beats on your helmet with a ballpeen hammer.
And, while today stock cars really aren't all that stock, other than the aluminum shell, at one time they were bone stock, as in race on Sunday, drive it home on monday. As recently as 20 years ago they were still BASED on stock platforms.
I used to LOVE CART, mainly because they ran all differant venues; temp. street courses (Long Beach, Detroit, ect.), dedicated road courses (Mid-Ohio, Laguna Seca, ect.), short tracks (Milwaukee Mile, Nazerath, PA) and superspeedways (Michigan, Indy) Now the IRL is trying to be NASCAR with openwheel cars.
FWIW though, I'd much rather watch Football or Baseball. While others complain that they're "boring" and "slow" they offer something that other more fast-paced sports lack. Strategy.
Football you run your play; afterwards you analyze how it worked out, what did the defense do? How can we adapt? What's their weakness? Can we outguess them? It is a game of chess played with 300lb pawns.
Baseball is another; the classic matchup pitcher v batter. Each trying to outplay the other. The catcher trying to get inside the batter's head, what's he looking for? What's his weakness.
The suspense AND
relaxation is what its about. My generation just doesn't seem to have the attention span for these subtlies. It seems nobody has PATIENCE anymore. Nothing is better than a nice slow summer day relaxing at the ballpark with a tall cold one.