In life you need to be competitive or you would never see some advancement in your life. You have to take the risk or you might not see your full potential. It is always better to take a risk doing something that you are not comfortable with or you won’t know you’re potential. As they say, there is no harm in trying, so you need to push yourself to do better next time. The same philosophy is applicable in a race as you do need to try to get a better position. Besides you would get a better prize for a better position and you can use that to upgrade your car. At least, you would have a better performance next race.
As a racer, you need to be fit since a race is physically demanding on the body. You would get easily tired and found yourself unable to control the car. At a high speed, it is almost impossible for you to react in time if you are not that fit. That is the reason, why most of the racers are fit in the first place. Only those competitive enough would have some money to take home at the end of a race and you need to be among them.
In this game, you need to finish first or at least get a good position to gain money. You can use the money to upgrade your car. When your car is upgraded, you would have a better chance at catching the first place, which would mean more money for you. Of course, you need to buy some upgrades for your car. The price of upgrade becomes pricier as you buy them. The game would also be tougher since there would be lots of other car getting that upgrade. You would unlock a new car if you manage to get a better position in each race.