I remember in the Academy my class Sergeant talking about patrol tactics and discussing the danger. He said at the start of every shift he told himself today is a good day to die. It was from an Indian saying. He meant policing is a dangerous profession at times and you’d better be prepared to kill or die at any time.
From my old school training as I learned it the saying you quoted would be better phrased as you do whatever you have to do to go home at the end of shift. It wasn’t slacking or hiding it was meant to prepare you for life and death situations.
From a former SWAT guy trained in HRTs you learn several things. One is the priority of life which is who is the most valued. It’s Victims, Innocent bystanders, Officers, Suspects. So when we trained it was ingrained that if you were shot the train wasn’t stopping for you. The train was rolling for the victims to save and the suspect to most likely kill. We had IFACS and we knew it was one us to treat ourselves until the op was over. HRTs depend on speed, surprise, and violence of action. While you are doing one you are giving up a lot of personal safety to accomplish the mission. The Priority of Life is under attack in some areas but it’s the gold standard for SWAT.
On an HRT/Active Shooter you learn the mindset that the suspect is getting killed/stopped unless it’s overwhelmingly clear that he giving up. Like standing naked in the center of the room with his hands up screaming I give up. If he’s uncooperative and preventing you from getting to victims he going down. It’s a completely different mindset from normal policing. It has to be trained and ingrained. You have to flip the switch and go. We spent a lot of time training them and rarely had to do one. It’s a huge example of a high risk low frequency call.
I think it was in this thread I mentioned an incident where two other Officers and I were going to disregard the IC LT and make entry into an apartment if needed. We would’ve been backed by our tactical chain of command but it’d probably would’ve been a shit show for for awhile.