In volleyball you can hit the ball, only once, but you can't catch, dribble it on the ground, or run with it. Those are the rules. Without rules there wouldn't be much of a game. Everyone would do whatever he or she pleased. There would be no cooperation, no play, no fun.
Rules provide freedom for people to play together.
And we all know what happens to the person who doesn't play by the rules. He gets thrown out of the game. On the block where I grew up, we loved to invent games. If you hit it just right you could get the basketball to fly with incredible force, enough to knock someone over. If you hit the basketball over the fence into the neighbor's swimming pool it was a home run.