Di Wen has taken a half-measure. Which is already a good progress. But even so, this is still far from being enough to be able to save the situation. As it stands, the mortal realm will resist longer, but as long as he refuses to confront the cultivators behind it under the pretense that 'there is no definite proof', that will only amount to delaying the inevitable. It is my belief that, in order to protect justice, one needs to introduce and tolerate a bit of injustice, because perfect morals and justice can only exist as an ideal. Trying to uphold perfect justice ultimately prevents any from ever being enforced as a rule. For as long as you can put a 'BUT' forward, the very concept and application of Justice will be questioned time and again rather than the rules being accepted as a natural fact of life. Feels to me like, Di Wen, by trying to follow rules inadequate to the situation, and trying to manage cultivators' pride and beliefs introduce way too many 'Yes, but' to be able to enforce anything efficiently, and before it is too late.