Board Thread:Warhammer 40k General Discussion/@comment-37.152.33.225-20131111163502/@comment-8881468-20131204092809

actually they do not lie outside the natural order of things, we are talking basic behavior, conflict solving and the likes. take f.e. the night haunter, totally shaped by his origins, or take religeous zealot lorgar, same thing, take corax and whoever you will. their tactics are shaped y their upbringing. they might have superior intellects and odies, yet for all that counts, even those intellects are used according to the standards and norms that shaped their personalities, thus dictating their modus operandi.

(sidenote their physical perfection and brilliance ofind is also one of the main reasons why they are fit to rule as the distance between a mortal man and a primarch is quite vast, thus  reducing the identification potential and understanding potential between ruler and ruled, thus undermining the basis of good government.

also if they returned they would never be official rulers of the imperium, they would be generals, as during the HH you already had something like the council on terra, dealing with the civilian rule.