while I agree with what you saying and what the video is saying there is a bunch of arguing about this.
Be interesting to see where this goes.
I was in my LGS once a while back and a guy was looking to trade his 1911 of some sort for a AR. The owner of the gun shop was inspecting his 1911 and did just this. After careful examination dropped the slide and put the gun back into the case. The guy went crazy he said he had damaged his gun. The owner who was very cool about it said show me where? The guy didn't have an answer. The shop owner politely reminded him that his gunsmith has been the only one to clean the weapon because he didn't even know how.
The guy walked out with out getting an AR. I don't know if he ever came back again. It was pretty
to be there and see it. The LGS owner was really calm and non'shalant about it. Played in perfect.