Laser sighting systems help officers with target identification, and as we well know when deploying any weapon system, target identification is key. We are not always going to have the luxury of getting into a gunfight under "ideal" conditions.
The majority of officer-involved shootings occur in low-light or dark conditions. So one of the most important tools that you can have is a good light. And sometimes the best place for you to have that good light is on the business end of your handgun or long gun.