Might take a lot of lawsuits to get them to verify info before acting on it.
911 call taker: “Thanks for your report. We’ll work on verifying this and might be able to get out there in 2-3 weeks.”
I don't think there can be any one-size-fits-all solution to this - each case must be assessed on its own merits.
Police: “Well, thanks for that. Have a nice day”...
Police don’t bust in and start opening fire, so your description of how this works is simply false, and removing their ability to respond to emergencies is absurd.