Also why you need a lot of managers at companies.
” a professional army often needs to be very intensively organized and carefully drilled to be effective. Because they are fundamentally deracinated (meaning ‘uprooted’ in the sense of ‘pulled out of a society’), professional armies have to recreate those social structures, through complex layers of hierarchy, which tends to mean lots of officers (which in turn often make professional armies uncommonly good at very complex forms of warfare). “
https://acoup.blog/2020/05/15/collections-the-battle-of-helms-deep-part-iii-the-host-of-saruman/