"Once you are used to stress you are more likely to perform better when being shot at."
Yuppers! And you do learn to follow orders, too. That ugly Msgt screaming at you will teach you that.
I think it goes beyond learning to follow order. I think it gets to where you just do what you are told to do without even thinking about it. Seems like a bad thing to train someone to do, except that in combat it usually is the difference between life and death.