Why do you assume we did not? The call would get to the point of talking about sending someone and then, if the convo got to that point, we were trained to ask

Why do you assume we did not? The call would get to the point of talking about sending someone and then, if the convo got to that point, we were trained to asked their address so we'd know where to send help. It's not like we just showed up somewhere and sat down in front of a phone -- there was a lot of training and procedure, and the training was repeated. Perhaps you misread "implicitly" for "inherently"? Regardless of the training I can only remember this situation happening once or twice. Things are likely different these days -- emacsen writes of mandatory reporter rules but back in the 1980s we had nothing like that, and no way to know the phone number much less location of the caller.