Happens with more than EMS, Fire, Police, etc are just as busy.
years ago I had a job installing e-911 systems including the ANI/ALI controller, dispatch consoles, Computer Aided Dispatching, etc. I was in and out of serveral counties in my own state and several other states around. What I learned was the people on the other end of your 911 call are just like any other profession where you have competent and incompetent people. It worried me enough seeing some of the incompetent people who might be the ones I would get if I ever had to call that made me start getting prepared. Then if you factor out the bad ones you still have the public wasting the time of the good ones. I saw so many dispatchers answer "I locked my keys in my car" call. Or people calling to ask for directions even.