Answer:
Because each elements had job that must be done. The earth was for enhancing the endurance of the muscle, While the fire is for increasing the temperature within your body that strengthen the insides. The wind is for calming the nerves or pain. The water is for moisturizing the skin that makes it soft. If one of the elements haven't balance, the remaining elements will definitely not work and might cause a serious pain or massive outrage of mental and physical health.
