This is a form of trust.
When it comes to understanding, some learn earlier than others. Although Chu Mo is very young, everyone present, whether they are human or other beings, are much older than him. However, they don't mind following such a "young junior."
For cultivators, this is in no way shameful.
Even old cultivators who have lived for thousands of years calling a young cultivator of a few hundred years as master—such occurrences are quite common within the Cultivation Realm.
Wisdom comes from the teacher, and oftentimes, a teacher's guidance surpasses a decade of hard cultivation.
Not to mention Chu Mo's kindness toward them is even greater than that of a teacher. It wouldn't be an exaggeration to call it a life-saving grace.
Those who chose to follow Chu Mo early on became the original core of his group in the Tunnel.
Chu Mo never intended to establish a gigantic force. If he intended to, he wouldn't have left the Elite Alliance.