You make some good points. Remember these people asking the questions and clarifying to make sure they capture as precisely as possible in the first, freshest moments after an event have no preconceived knowledge about the people, places or things they are being called about.
We, WBers, have so much background knowledge it's easy to ask, or question all the re-confirmations. They need to do that, they are highly trained in asking the questions to get the most precise, detailed information. Whether to deal with something on-going, an emergency, or, to be the 1st gatherers of information from the scene of something like this.