If you consistently train using this box or some other impractical training method on the range, will you look for the box on the street before you shoot? If you're running for cover, will you stop to plant your feet "properly" before you return fire? If you're fighting with a bad guy over the possession of your weapon, will you hold your fire until your feet are in the "right position?"
Some of you may think these ideas are too ridiculous to think of, but think back to our recent past. Think back to April 6, 1970, to the gun battle that has become known as "The Newhall Incident."
On that dreadful day four young California Highway Patrol officers lost their lives in a running gunfight with two career criminals. During the subsequent investigation of the incident, some of the officers were found to have spent shell casings in their pockets. In the middle of this horrendous firefight, that only lasted 4.5 minutes, the officers did exactly what they had been trained, conditioned, or allowed to do on the range. Rather than waste time picking up empty brass at the end of the range training, just eject the empty shells from your revolver into your hand, and put them in your pocket.
There is another case involving an officer who was wounded and lying on his side. Civilian eyewitnesses stated they observed the officer repeatedly trying to sit up to reload. The officer had been trained to reload from a seated position, but had never been trained to reload while on his side. The eyewitnesses watched in horror as the bad guy calmly walked up to the officer and shot him in the head as the officer was still trying to sit up to reload.
You will not always fall back on the bad habits you learn in training, but sometimes you will. How else can you explain the two incidents discussed above?