system
Given the following post, respond as if you're commenting on Reddit:
human
[Horus Heresy] How are the Primarchs and Astartes so entirely undisciplined?

I'm a Remembrancer attached to the Word Bearers Legion, and recently I've begun to wonder how the Emperor and the Council of Terra tolerate the behavior of the Astartes and the Primarchs as regards His will and the lives of His subjects. I've seen smuggled Picts and heard reports of Aurelian himself striking the Sigilite, the Emperor's right hand, on Monarchia many years ago.  Just recently, I have heard of the savagery of the Lupercals captain's in the wake of Horus' wounding, when they spew dozens of civilians attempting to see him and offer devotion.  And it seems no one punishes them, or takes them to task?  How can an Imperkum function as a peaceful society for its citizens when superhumans with a complete lack of accountability can kill, maim, and murder at whim?
gpt
Because the Legiones Astartes do not operate at the heart of the Imperium, they operate at the frontiers of Imperial Space. Where men had forgotten their roots and are more barbaric. Where 20ft tall Orks rape and pillage entire sectors of space.