Dossier
The flashbang is the entry tool when the room needs to be cleared without fatalities accumulating inside it. The count matters in Leonida. More bodies mean more investigation, more press, more VCPD resource commitment. A flashbang entry keeps the count manageable.
Two seconds of useful disorientation after detonation. That is the window. Move through the door, identify and control, secure the position. The subjects recover. The window does not last.
It is also the extraction tool. Thrown behind the withdrawal route, it disrupts pursuit long enough to reach a vehicle or an exit. The disorientation radius is not large but it does not need to be large if it is placed correctly.