For fear of others surpassing them, a person might try to stifle their peers out of jealousy. Such behaviour was foolish. If a person truly wished to make progress, then they must adopt the attitude of always striving to better themselves, just like Sun when he had released the videos of his duels to announce that he was seeking new opponents. He had endlessly challenged stronger people while stubbornly pursuing the goal of improving himself even further. Only then was he gradually acknowledged for his talent by the rest of the player base.
Even geniuses had to take a step at a time if they wished to reach the apex.
By exchanging pointers with Sun, Nie Yan might find the flaws in his own techniques while also learning many new ones and slowly progress.
Whatever the case, he definitely had to keep Sun in his guild, but at the same time, he also had to give him enough space to grow so that he could walk a similar path as his counterpart in the previous timeline.