Would a one of a kind car drive any different than a plain red, white or blue one?
I don't think they do.
Is I want to be creative I'll grab a piece of paper and a pencil.
@
IceMan PJN: The fanboy comment is unnecessary
The logic of this is like saying what's the point of cars looking different in general? Every car in the world should be a hollow tube and they should all be the same color. Shapes and curves that don't affect ability are completely pointless as is color. And while you're at it, we should all get rid of fashion and wear uniforms. There isn't even a need for different people, we should all look like clones of one another, and act the same.
We should listen to the same music and like the same movies, and...
Need I go on?
Vinyls, liveries, body kits, paint jobs, & custom rims = INDIVIDUALITY amongst numerous other things like UNITY if you want to make a team car for a racing league, BEAUTY to make a vehicle that you may not regularly take notice of capture your attention in a way most unimaginable, AMAZEMENT for vehicles you wouldn't expect, and many more ways you can shock, awe, amaze or blend in.
You could even choose to be as simple as placing your name in cursive to tell your white car out of the pack of similar white cars of the same model on track, placing a flag on your car, honoring a deceased love one, a romantic gesture with an artistic expression, a declaration of victory, to declare a challenge, etc...
There are so many ways to use it and to do it in a way that's PERSONAL to YOU. Changing THIS GAME into MY GAME. And A CAR into MY CAR. Personalizing a gaming experience to make it unique to yourself and only you. That's what liveries is about.