Really harm seems like an arbitrary and unrealistic bar for this stuff.
Calls before the caller died often make the news, personally I don’t want to be remembered that way and I doubt most of them want those moments made public. Often, 911 callers are in situations they would like to keep private and outside of criminals cases it seems unlikely for significant public benefit to occur should they generally be made so.
Citing 9/11 is a great example. We have better information of what happened, how people became trapped, and how the response was handled. At the very least family members should be able to obtain access to recordings about their family and callers should be able to obtain their own calls. This isn't some wildly hard concept. Calls to a public entity about private individual happen. Medicine is another field that exists but family members can gain access if needed.
Calls before the caller died often make the news, personally I don’t want to be remembered that way and I doubt most of them want those moments made public. Often, 911 callers are in situations they would like to keep private and outside of criminals cases it seems unlikely for significant public benefit to occur should they generally be made so.
Sure, you can get the details on 911 calls made from the World Trade Center on 9/11 here: http://thememoryhole2.org/blog/911-911-calls But, why must this be public info?