The Blue Star had to nurture a Small Universe powerhouse.
Xu Tui had already considered this. He had also discussed it with Principal Cai, An Xiaoxue, and the others many times. This importance was similar to the earliest nuclear bombs on the Blue Star, but not completely.
It was not just a deterrence.
The Blue Star looked like it was thriving and its strength was surging. With the current strength of the Blue Star, they could withstand the attack of any of the three alien races. Even if the three races joined forces to attack, the Blue Star could still fight well. They could even gather their strength to severely injure one of them.