The Wendaozong, stripped of its identity as one of the five great sects, is still a well-known presence in the world of cultivation. It's like how parents warn their children not to play with bad kids; elders often advise their disciples to stay away from the Wendaozong. However, there are always some rebellious disciples who mix with them, which is quite distressing.
Take Lanting, for example.
Fortunately, the higher-ups in the cultivation world know that the Wendaozong isn’t beyond saving. Ever since the previous leader of the Wendaozong disappeared and the new leader, Yunzhi, took over, there has been a noticeable improvement in the sect's behavior—mainly, they no longer harm others, only their own people.
If you think of the Wendaozong as a mental hospital, then Yunzhi is like the director, one of the few normal people around.
Having Yunzhi show up is definitely better than having anyone else come.