Of course, things aren't that simple.
First and foremost, the power of the Five Internal Gods is strong, and Wang Sheng wouldn't possibly give it up. Suppressing the Spirit World would limit his ability to use the power of the Five Internal Gods, and he had to consider whether it was worth it.
After all, at least for now, the Spirit World seemed to be of less help to him than the Five Internal Gods, and even in the long run, the Five Internal Gods seemed to have an advantage.
Another issue was that the power of the Five Internal Gods had not fully awakened yet, and the Five Elements were not balanced. If the Five Internal Gods were summoned for an extended period, it could affect him. If that were the case, it would be better to dismiss the idea as soon as possible.
At least he would have to wait until the other two Five Internal Gods, Xuan Ming and Hao Hua, awakened before considering these matters.