Why do traditional lion dances need arhats?

First of all, Qing Niu Jing has not yet reached the point where it is worth the Tathagata's hand. Although the Tathagata knows the ancient and modern future, if a Wuzhishan falls like the one in the Monkey King, the green ox essence will be crushed to death, but he is just a green ox of the old gentleman, and he is not worthy for the Buddha to step down from Lingshan himself. Otherwise, he has to deal with a mount, so how can Buddhism compete with Taoism? What's more, Qingniu is just fighting with magic weapons.

Then, Qingniu Jing didn't die. In fact, Qingniu Jing didn't mean to eat Tang Priest at all. He changed a fairy tale village by the roadside. Pig Bajie and the three of them pretended to wear human clothes while the Monkey King was away. As a result, Qingniu Jing was caught. So Qingniujing actually caught three thieves. You can't kill people just because it's Tang Priest and his disciples who steal things. So sending eighteen arhats is just a formality.

Finally, although Qingniu Jing said that she had lost it, it was actually difficult to make it. The green ox sutra may have been sent down by the old gentleman in heaven, and the Tathagata knows the past and the future. He already knew about this kind of thing. It depends on the owner to beat the dog, right? So he suggested that the Monkey King and the Monkey King should be in the sky, and the result was too high to accept.