Racing is really a tough sports as it is, but it becomes tougher when there are no rules since other contenders might bring dangerous things. More likely, they are likely to bring some guns in the race and try to blast their opponents in the game. That is why, it would be safer to race in a real race.
However, in this game, you will have to equip your car with a gun since other contenders will also blast you. At the end of the race, you will get rewarded based on your position in the race. You can use the money to buy some upgrades or save it for buying a better car later.