Obviously you have never called 911 from your cell. From a land line at your house you don't even have to say anything and they know where you are. That's how 911 is supposed to work. Call from your cell and you can have fire trucks showing up at your blanket on the beach or at the address you gave only in another state.
It's bad to make assumptions. Even worse when you make assumptions based on false constructs.
Yes, I have called 911. From a landline, it's automatically routed to the local police and fire dispatch. From a mobile phone, it's automatically routed to the Highway Patrol or State Police dispatch. It doesn't matter where you call from, they won't automatically send fire trucks anywhere since they don't even know the nature of your emergency when you call. You have to TALK to the dispatch first to tell them what the emergency is and where the emergency is. Only in rare cases where you are incapacitated or otherwise unable to speak will they send police and possibly EMT to your location *if* they can determine your location which is not always possible from a cell phone call.
In any case, you call 911 and you tell them the nature and location of the emergency, even if you are in another city or another state. Tell them the full address and they will figure out how to contact the appropriate agency in the jurisdiction of that address. It's really not that hard.
A smarter person will save their local police and fire department phone numbers in their cell phone contacts. Just like we used to write them down in our little paper address books in the days before cell phones or 911.