As Li Yao had stated, both the Silver Covenant and Dalaran greatly cherished their reputation.
Until now, virtually no players had unlocked this reputation, largely because they simply did not wish to enlist so-called players for tasks, considering the players too weak.
Having failed in their operation and deceived to boot, the losses were unimaginable, and with competition so fierce, not advancing was to fall behind.
Furthermore, their original intention was to take advantage of the enhanced attributes here to reap benefits, and now they could also undertake quests, so why not?
Therefore, despite their deep-seated hatred for Li Yao, they were neither able nor dared to hold him accountable for the time being.
One could discern Li Yao's current state and deduce his solid relations with the two high-ranking NPCs; attacking Li Yao would invariably invite their retribution.