Of course, if there are still surviving humans, that would naturally be best.
However, this was Lu Yuanming's thought, while whether it was Zhang Hanqi, The Emperor Angel, or a seasoned deceased like Ye Xingxun, they felt that the most dangerous world was the one that remained a perfect, dead silence world.
Generally, a world with completely destroyed or polluted environments is certainly worthless, but the danger level is the lowest. Such worlds are often smuggled from lower planes through certain methods, whether through sacrifice or cults, causing those super beings to descend upon the world, reap all life, and then abandon it.
Such worlds usually only have wandering lower creatures or undying creatures and no terribly horrifying beings, with the danger level mostly centered on the environment.