Rugby players running to the middle of the end zone is a traditional celebration in the sport. This practice is done to show respect for the game, the team, and the fans. It is a way to show that the players are thankful for the opportunity to play and celebrate the victory with their teammates. The act of running to the middle of the end zone also serves as a reminder to stay humble and to give back to the game. Finally, it is a way for the players to show their unity and demonstrate their commitment to the team.