Speaking as a CSM of a Training Company for a Reserve Infantry unit, one of the things I do before we send our recruits off to their BMQ or DP1 training is have an open and frank discussion about expectations.
BMQ, in the end, will qualify a soldier to wear a uniform, march, dress a wound, survive a CBRN attack, and operate a rifle.
The basic military task is to take a rifle and stand a post.
The implicated task with that is that you will be equipped and capable of delivering deadly force within your rules of engagement, and also expected to do so.
Simply put - you can kill.
You also become a valid target/combatant from the enemy's perspective. Bearing in mind that this enemy could be in a crowd watching a parade downtown at a Cenotaph, or in a trench on the other side of the battlefield.
I want my troops to be mentally prepared for that - or at least to have considered the implication before they start the course.
From the perspective of a trained member of the CAF, many of the things that recruits do IS actually wrong. If you do the same thing wrong more than once, then you should expect your staff to be hard on you. Failing to learn from your mistakes is not a good thing.
The norms of society are "thou shalt not kill" - as an infantry soldier, your primary role is the delivery of potentially deadly force in the face of an armed enemy under direction of your chain of command following the guidance of our civilian leadership. Breaking that norm in a controlled fashion is a delicate art.
NS