I like 'Active Self Protection' videos, but I think there is a contradiction here. They also preach about "don't draw on a drawn gun" (even mentioned it in this video)! Especially when there are "multiple armed robbers" as noted by the narrator. The look of the video is that the robber wasn't intent on shooting anyone, and didn't do so until his life was threatened. To me that is the lesson here. When you pull a weapon on someone they are likely to fight for THEIR life. There seems to be a mind set that the criminal will cower at the sight of the hero's gun when presented and that just isn't always the case. I realize the OP was going for the chambered vs unchambered debate, but "self explanatory" assumes that all would have ended well for the victims had he been able to fire shot(s) immediately. Lots of other things could have gone wrong, missed shot(s), safety on, malfunction, or success against the first robber only to be killed by the second, etc. Point being when you engage it doesn't all go your way, especially when you are at a huge disadvantage in both numbers and preparedness. Argue chambered/unchambered all you want, it isn't the only factor or the biggest factor in my opinion.