I suspect car shows are about having/entering a car that is pleasing to the judges, based on what that particular car show's standards are.

There are different standards for Donks, Low riders, ricers, stockers, modifieds, etc. That is why car shows have different classes.
Within each class is what the judges believe to be pleasing to that particular class.

I suspect that for people who enter car show competitions, it is about the "thrill of victory", so to speak. For people who have never experienced the thrill of victory, it is difficult to explain to them what it's about.

A General Principle of Life......
For smart people, when they don't understand something, they educate themselves. For other people, they choose to ridicule or laugh at what they don't understand.

Examples available on request.

Folks, people need some sort of passion in their lives. If there is nothing in life that a person cares strongly about, they need to find another life.-Bob