Han Yi and his group's greatest advantage was that their abilities were stronger than those of ordinary Superpower Users, which, of course, could not be separated from the help of Crystal Cores.
Han Yi was not naive enough to think that the base was friendly to them because of his former identity as one of the Han Family's young masters. Once the base had stronger Superpower Users, they, he feared, would no longer have the right to say "no" to those in power. Just like Han Rui at this moment, who had to join the so-called ability team in order to earn a place in the base.
This world had never been about reason. If you want freedom, if you want to say no, first, you must be strong.
What they needed to do now was to enhance themselves as quickly as possible before the base solved the mystery of the Crystal Cores. That way, they could avoid becoming the prey.