In an emergency, why does a dispatcher ask so many questions? Why don’t they just send a car?

Questions are asked so that the dispatcher and the responding officers have all the necessary information regarding descriptions of vehicles/persons involved, any injuries, any weapons used, etc. This also helps the officers understand the severity of the situation, how many officers should respond and the priority for emergency/non-emergency calls. In short, the information helps us to respond more appropriately to your emergency.