It is a convenient form of transportation.
The purpose of the automobile when it was first invented was to provide a faster and more convenient mode of transportation than horse-drawn carriages.
To get to places without walking all the way.
It is noise .
noise
To get from point A to point B in the fastest, simplest way.
it helps your toy or what ever go faster
It was no accident. Men worked long and hard to develop the automobile. I will post a link for you with lots of information.
It serves the purpose of the Freon for your A/C .
Noise !
The noise
The purpose of the inlet valves in a petrol driven automobile is to allow gas pass into the combustion chamber.
To provide a high quality automobile that would last a lifetime.