Um, you're having that thought because she looks like Little Dragon Girl, tempted by her appearance.
The establishment of the sect is greatly beneficial to the entire Tianzang World, which is the reason Qin Yu specifically broke the rules to bring people to Wuque.
Because once Fang Yourong establishes the sect locally, it will create an unparalleled bond with the entire Plane.
As for the benefits...
Fang Yourong finished establishing the sect, transformed into sword light, landed on the peak, her sleeves gently fluttering as she sent Ying Ruoruo and the others back to the Heavenly Realm.
After all, having ascended individuals stay here for long would break the rules; Qin Yu doesn't mind taking on responsibility, but Fang Yourong wouldn't indulge them.
In the face of collective interests, she still chose to shelter Qin Yu.
Of course, Fifth Daoling didn't leave.
Fang Yourong knew he was close to establishing his own sect too.
