Umm...we do deny service until calls are completely safe. Do you not do this?
Do we? Do we scout the call, account for all occupants of the home, secure all firearms and post guards everywhere and only then go in, or do we show up, knock on the door and bravely venture into the unknown with a hopeful "theres no one obviously here trying to kill me". This situation the firefighters found themselves in was unavoidable- they were ambushed by a gunman inside a residence, probably with limited access, and how do you try and escape when it means probable death for you or a good friend?
EMS, as a whole, goes into potentially dangerous places all the time. Here in Oklahoma, a majority of the homes I visit have firearms, alcohol, and stressed-out people. Its a nasty combination I combat by staying in the home as little as possible and only really following the "Lifenet" when it is a verifiably safe scene, ie a nursing home or Grandma really is home alone.
This incident has taught me to never get complacent, be ready to make a break for it if I can, and be prepared to get violent fast if needed, be it a fist, a knife, or a gun if I can get it. I might also need to talk and wait it out, as these guys did. Not having a firearm hobbles my potential responses considerably, but I do share the general sentiments of the board that EMS providers as a whole are not trained enough to carry without massive changes to existing policies and procedure. Sending police to more calls is a nonstarter here- that would literally take thousands of officers for no benefit in OKC alone.
Operationally, Fire is getting cancelled a lot less. More people = more control.