This isn't about whether the Great Emperor Ziwei has confidence; it's clearly about the Elder Lord's arrangements.
However, he couldn't find the words to refute.
He couldn't just tell the Great Emperor Ziwei that the Elder Lord already has plans, and Sun Wukong has an important role in them, so Sun Wukong must not go into closed-door cultivation.
Saying that would probably invite the wrath of Lord Taishang.
Because, in doing so, it would cause the Elder Lord to lose the upper hand in conversations with Sun Wukong and the others.
In any case, Lord Taishang does not want such a situation to occur.
Sighing, Green Ox could only turn and leave.
He didn't see the hint of a smile in the Great Emperor Ziwei's eyes as he turned around.
The Great Emperor Ziwei understood perfectly well, but was just pretending not to know.
Did he really not understand the intricacies involved? He just wanted Green Ox to say it, to bring the Elder Lord's stance into the conversation.