As three of his disciples left the sect to explore the world and further their own strength, Xuan Hao was left with only two disciples in the sect. One of them being fully absorbed in crafting some kind of artifact, while the other rarely ever took a step outside of his forge. Even if he felt a bit lonely with all his disciples leaving the sect to explore the world, he had a feeling that the two remaining ones wouldn't be going anywhere soon.
At the very least, he couldn't see Bai Ning leaving his forge to explore the world.
As for Mui… He felt far too worried about what she might do if she ended up leaving the sect. Not just because of the potential damage she could cause, but also because her unique abilities might end up drawing the attention of the Blue Sea Empire or other major powers.