Many race clickers are PvP (Player vs. Player). If you are clicking manually at 8 clicks per second and your opponent is using a script running at 25 clicks per second, you will lose every single race. The script levels the playing field.
When players search for an "Easy" script, they are typically looking for a few specific functionalities: Easy Race Clicker Script
Teleports your character to the end of the track repeatedly to farm win points. Many race clickers are PvP (Player vs