The Third Mirror Shard

The disciples of the Ninth Sect had originally wanted to join forces and kill the people from the other sects, but Ninth Sect's leadership, including its Paragon, had prevented that from happening.

In the final analysis, the Ninth Sect was part of the group of nine sects that made up the Vast Expanse School, not an independent entity. It was true that the Ninth Sect's expansion and growth in the outside was a terrifying thing to the other sects, and the sheer number of cultivators who made up their forces there was fear-inspiring.

But in the end, the Ninth Sect... had not split off from the Vast Expanse School to be independent.

Also, the Ninth Sect was actually benefiting from the matter with the Vast Expanse Shrine. Not only did the Ninth Sect have more disciples in the rankings than any other individual sect, but the way the disciples fought even harder because of the humiliation also led to spectacular results.