I would contend almost no race is a barn burner, in most years you have a 95% chance of the winner coming out of the first two rows, and I would suggest 75% of the people watching understand little to none of the engineering involved. It's just the racing that the rest of the world has, and that is what they watch. If they had only NASCAR and we had only F1, I'll bet NASCAR would be the world's form of racing. A lot of the loyalty comes from allegiances people have to teams and drivers from their home country or fandom for certain car makes even if they don't own them. I'll bet 90% of Ferrari F1 fans don't even OWN a Ferrari. By contrast, I'll bet at at least 80% of Chevy NASCAR fans own at least one GM product.