Obviously, Wutian's analysis was very thorough.
If Taiyi had become a saint, the war wouldn't have broken out. The heavenly Dao could have completely controlled that.
If Hongjun or other sages of the way of heaven had intervened, the war would not have caused such a huge loss of lives. The two races would not have been destroyed, and the way of heaven could have settled this easily.
If the kun Peng didn't steal the book of Luo and the river diagram, the demon tribe would win. At least this tribe could survive and half the casualties would be lost. If not for the heavenly Dao, the kun Peng would never do such a stupid thing.
From this, it could be seen that the heavenly Dao intended to exterminate the demon and sorcerer tribes.
No matter which side won, at least one of the two tribes would survive.
However, it was precisely because of all these schemes and manipulation that this war had finally developed to the point where both sides lost.