It's pure mechanical skill you train in these things and you can adjust everything to feel like the game you're practicing. It creates a controlled setting in which you can continuously practice instead of having to do in a real game or lackluster practice mode.Humm weird. Didn't knew these were a thing.
Wouldn't it be better just to train in the games engine with its weapons? Seems kind of counter productive.
there's probably some benefit i'm not aware of.