Look, NYC is infamous about cops handling their weapons poorly. I thought everyone who pays attention to current events knew this, but I guess I was wrong.
As for your claim that we never face these stressful situations, that's flatly false. Guns are used ~ 2 million times a year to stop crimes (probably more now, those figures are some years old), and there are a number of active shooters who've been stopped by citizen concealed carriers.
But you of course wouldn't know of them because the national MSM for some inexplicable reason doesn't report these incidents. If your Google Fu is up to snuff you can find them. Try including "mall" and "church" for starters
Is that impressive? The cops in flyover country come to the job with quite a bit more experience than that. 10-15 years of hunting, target shooting, safety training in school at multiple grade levels, and the supervision of experienced adults probably doesn't completely transfer to open carry as a peace officer. However, this "13 days" figure will make me a little nervous the next time I'm around a young cop in NYC.
"Gun culture" has absolutely nothing to do with trained police officers. New NYPD recruits go through 13 days of firearm training, and submit to semi-annual requalifications[1].
People with carry permits are never faced with the kind of stressful situation that an active shooter would provoke. It's utter lunacy to think that they would be able to stay calm and diffuse the situation.
[1] http://home2.nyc.gov/html/nypd/html/training_nypd/firearm_ta...