This is only true on the basis of the game’s definition as long as there are three dice in the cage. Cages are also used for other games such as High/Low (Under and Over) but with a different number of dice.
Hii ni kweli tu kwa misingi ya tafsiri ya mchezo wa muda mrefu kama kuna dice tatu katika ngome ya. Mabwawa pia kutumika kwa ajili ya michezo mingine kama vile High / Low (Chini na Juu), bali kwa idadi tofauti ya dice.