One can avail oneself on legit trainers who run FOF classes (after they think you have your shit together). Realistic exercises have folks shooting back at you with various things to go OUCH! Nothing like a run (I mentioned this elsewhere) where you have to peel a t-shirt off your back has, surprisingly, the close in airsoft gun broke the skin and you bled - because I learned a lesson about running through a door.
Setting up a realistic exercise - truly realistic (whatever that means) is expensive, labor intensive, scripted, lots of staff, slow to run.
Also your wife yells at your for being a stupid old man for coming home with bruises and scabes and aches and pains. Wear a contraption on your hand and forearm because you broke some blood vessels in your hand in 'realistic' knife class. Now, I'm not comparing my fat old self to those brave folks who do this stuff for real. However, if you want some realism - that's how it goes.
In TX - my IDPA group (sorry for the IDPA haters - but it was my speed), had law enforcement - local and state - aeveral SWAT team, Federal officers, military who were in the area. Guess they were fooled into thinking it was a good thing to shoot matches. Handguns and carbines.
Last, my idea of actually seeing a competition screw up in the real world videos - oh, it can't be done as statistically, blah, blah. That's not really an argument if you are implying some kind of averaging look. One can look for a critical incident. Newhall wasn't. North Hollywood was a one off - not statistically relevant. Anyway, that's not how statistics work if you are implying significance testing.
And screw appendix carry as an objection - you can in some venues. Also, while some think it is the end all and be all of carry - guess what - many, many folks don't do that.