Live simulations allow you to test learned skills under realistic conditions. You get practical application over theory alone.
An important distinction is that it is not 'acting' or 'role playing', which can be uncomfortable for participants... with everyone 'pretending' for each other, and in front of each other.
In a live simulation we bring in professional simulators, you are in a room with only the simulator(s) and a camera, and it is as much like the real thing as possible. There is no pretending. This is you reacting to what would normally be a stressful situation with your best responses, and the new ones you hope to embed. Improve by direct realistic practice, and learn more from the video about what needs to improve.
"Even practicing under mild levels of stress can prevent you from choking when high levels of stress come along"