Yes, this is an online literature brainwashing plan. As long as these online novels can circulate within the Star Union, anyone who has read these novels––or the TV series adapted from them––will subconsciously treat the Subspace Demons in this way. Wouldn't it make things much easier?
The Emperor, you see, you don't understand the human heart.
Of course, there is no need for the Star Union to put out any official regulations. People have rebellious spirits, after all. Trying to push them this way might lead to public discontentment. Also, there is no need to be overt: we only need to ban novels that glorify deities and demons on our websites under the pretense of promoting feudal superstition. Then, we promote novels that revolve around the slaughter of gods. Seeing this method makes money, authors will naturally start writing along these lines.