Re: I've always wondered...
Emergency data isn't just "An emergency has occurred. Details here." They can include other information, for example communications from responders to a wildfire. That's voice because the people involved can't take the time to type out a message when they are both fighting the fire and looking out for a situation that means they have to get out of there. So there may be some need to put them on their own circuit that can't be restricted. It doesn't mean that other companies or users deserve that.