Why not just kill the monkey?

When the monkey first broke into the Heavenly Court, I asked Taishang Laojun.

This old man, who has always been arrogant, showed a bitter smile at this moment:

"I don't know what's going on either. Those three cannot be killed, only tamed."

Tamed?

Make the Great Sage Equal to Heaven accept the Heavenly Court's amnesty and become a dog of the gods.

Make the most talented and rebellious disciple of Buddhism return to seclusion.

Make the lost souls by the banks of the Flowing Sands River submit to the Heavenly Court.

Is it to tell all beings that only loyalty to immortals and buddhas is the right path?