It is always ideal that you will follow the safe driving distance rule because many things may happen when you are driving too close to another car. There are instances when the other vehicle may call the police because they will find it creepy that you are trailing behind their vehicle closely.
There is also a possibility that your car will suddenly stop in the middle of the highway, and those that are not following the safe driving distance rule may also become affected. Some of them may even get more affected than you. Following this rule can help protect you and other drivers on the road.