I am glad you read it - there is a lot there to talk about! (In person, and soon - maybe Thanksgiving!)

Also anecdotal, but I read an interview with a guy who was in Somalia in the 'Blackhawk down' operation. It was his first combat operation and he said "It was just like training - a bad guy pops up from behind cover, you shoot at center body mass, and he falls down, another pops up somewhere else, repeat."

To me, that sounds like for him, the core element of training was just like the training you get from the "light plastic fake gun, while standing upright in an entertainment hall".
This is the core of the difference between modern drills and 19th century ones. The 19th century drills focused on loading the weapon quickly. The modern ones focus on shooting for center body mass and dropping targets. Interestingly, lots of 19th century weapons recovered from battlefields find the weapon loaded upwards of 8 times without ever being fired.

Now, I am a big fan of shooting games, and I don't think I am unhealthy or a killer. But that's anecdotal too.
In the end, I am with you - we need a better defense for our beliefs that actually deals with what evidence there is to the contrary.