Why must a racecar driver be very selfish? what problems might this cause beyond the race track?

the novel The Art of Racing in the Rain.

A race car driver must be very selfish if he must emerge the champion. Even if his family is racing behind him, they must come second.

The concept of race car drivers being selfish is to maintain success on the track.

Beyond the race track, this might in being selfish in life which will affect one's relationship with people and make one egotistic.

Explanation:

The novel, The Art Of Racing In The Rain follows the story of Denny Swift, a race car driver. Denny was customer representative in a Seattle BMW dealership.

He had a dog, Enzo, and believes in the legend that a dog "who is prepared" will be reincarnated in his next life as a human.