Having read up on the game a little bit, I'm not sure how much I'd enjoy it...I think the fiddly "you must press X to holster your glock safely" because GLOCKS ARE APPARENTLY THE MOST DANGEROUS FIREARM IN EXISTENCE would quickly get on my nerves. I get the idea is to simulate the need to keep your head, be careful about doing things with firearms, but...when you drill with a firearm IRL the "finger off the trigger" muscle memory develops very quickly and much more solidly than pressing a key on a keyboard ever would.
Yeah I can see how that might be annoying! I like it because it emphasizes, well, how incredibly dangerous firearms are (the game seems rather aware of the fact that most gunshot wounds are self-inflicted), and it's def. murphy's law. It's not exactly "press x to holster safely", it's "hold x". So when you do a quick "OH ****" press things might happen. The game punishes you for panicking. If you have gun drill training, you'd probably be panicking less then I am!
Personally I just follow the austrian police's doctrine of, err, carrying around the firearm without a bullet in the chamber, but it's hard to keep focusing on that when you've got things trying to kill you but also reasons to keep holstering your firearm (whilst in, well, a gunfight you're probably not going to be holstering and unholstering your gun constantly, you'll have plenty of magazines that you don't need to fill up constantly, etc.).