system
Given the following post, respond as if you're commenting on Reddit:
human
[40K] Why can't The Emperor just...fix himself?

This has bothered me for awhile, but couldn't He sort of weaken the  Astronomican for awhile or get more sacrifices, allowing Him a bit of psychic freedom, then repair Himself somewhat so that He would need less/no sacrifices and be able to do stuff other than Astronomicaning? Or is that just not how any of that works?

(Please forgive me if this is considered heresy)
gpt
The majority of his efforts aren't spent maintaining the astronomicon.  They're spent keeping the crawling gnashing mass of demons from spewing forth out of the yawning chasm into the warp that is the human webway, ever since Magnus broke the wards and nearly turned Terra into the center of a new eye of terror.

Containing what would otherwise be a light years wide intrusion of chaos into realspace, the astronomicon, and being a corpse, is enough to hold the attention of even the emperor.