Not at all. That is part of the discussion thing. Dont worry, I wont demand your biography.
From one of my earlier posts I laid out my tactical thought process. The driving considerations are 1) Do I have to go into that room 2) Do the walls stop bullets.
There can be multiple reasons that you "have to go into that room". Whatever that driving force is, If I have to go into a room. Im going into that room. Pieing, IMO, is fairly easy to be compromised while doing. The atmospherics that can be stacked against you are amazing. Lighting, noise etc. Now, I have a bad guy, who maybe was unaware, but now way more aware of my presence. This gives him the time and ability to fix me with fire. If I had to go into that room, I now am in a deficit getting into a slug match. Could you sneak up on a door and shoot some dudes with them never knowing. 100%. IMO that is something easier said than done. So to stack the odds in my favor, Im going to do (IIRC) what Craig teaches in AMIS and use dynamic movement in an attempt to draw the muzzle traverse. Also referred too as running rabbit. I am now relying on me setting the pace of the fight. This coupled with people suck at shooting moving targets and tend to shoot where you were...
You also brought up, what if there are multiple guys in that room...Well...if there are multiple guys in that room, and you are pieing the door. Im not sure how you think that is going to go down...They dont just stand there and let you take them one at a time. The simplest answer is they all do a mag dump at the door....
Next you mentioned Afghanistan and Iraq. Structures in those parts of the world are drastically different in terms of how the interact with bullets. There are numerous other things at play that I will not discuss. But those are part of a tactical thought process and escalation of force .