You can tell because Guoyu uses traditional characters as the simplified form were touted by the CPC.
Just different acceptable levels of risk. You see the same thing in non-gun martial arts in RoC. The training weapons are often real, and frickin' razor sharp. Ask me how I know.
It should be noted that these guys are not the only ones who train in 'live' situations with live ammo. It's not something to be 'feared' but it is to be respected.
Gotta have confidence in the abilities of your partners / team, and utter confidence in your own abilities.
Maybe if I was in some kind of high speed Delta Force/SEAL Team 6 hostage rescue unit. But as an armed citizen? NOPE.
I train in defensive gun use to AVOID being injured or killed. The last thing I want to include in my training is something that puts me in GREATER DANGER than what I might face on the street.