...an org to kill and destroy, not a feel-good summer camp to discover yourself
Yeah.
At IBM, some of those people might be with you for thirty-fourty years. Everyone is an adult, and everyone is educated. You don't want some guy being miserable, and ready to hang himself.
Bad for team morale, and again - a distraction. Better to yell at the others to get in line and treat him like a human being. Then back to business.
When you're dealing with kids, as you do in the US army, it's totally different. Especially kids that are from the street, with in many cases strong Catholic upbringing.
In four or five years, they'll hopefully be out and entering the civilian world - either through college or work. You have them for just a few years, and you need to do extraordinary things together (if it is a war time context).
There's no space for sitting down and singing kumbaya. You are not their father, you are not their guidance counselor. You expect them to perform extremely difficult tasks, and some of them may die fulfilling your asks.
The last thing you want to do is sit them down for stupid disciplining sessions where you read to them from the United Nations Convention on Human Rights.