Wu Xing's words indeed tempted some Supreme Perfected Spirits.
Unimaginable determination and boldness was required for one to self-destruct their Dao Fruit.
The shattering of a Dao Fruit would cause one's soul to dissipate and they would not be able to enter reincarnation. It was equivalent to cutting off their chances of rebirth.
Unless they had no choice, even if their Perfected Spirits died, they might not choose to self-destruct their Dao Fruits. Instead, they would leave themselves with a trace of hope.
Furthermore, in a battle, any hesitation would cause them to lose the chance to self-destruct their Dao Fruits.
For example, God Son Ming Hui earlier on was restricted by Astral Imprisonment and could only watch helplessly as he died in Su Zhu's hands.
As for Shi Po, he had not expected to be killed by Su Zhu's five palm strikes!
