Now they need to do the scenario a few more times and at least once tell the aggressors that the others are unarmed when they aren’t.
That would be very interesting.
Yes, it would be interesting. Otoh, there is a big difference between being unexpectedly hit, in a mocked-up scenario, with a paintball, and unexpectedly hit in a real life death-drama with a bullet. A huge difference, it seems to me.