I provide in home care often for people who are sometimes at risk of harm from others. In the past we have had restraining orders against individuals which only work against law abiding persons, duh. I have had to lock down the home and wait for the police to arrive which really takes forever when you are under attack. Now since this is in my own home and I have now begun to exercise my right to carry a firearm for protection, we have not had to file for even one retraining order. It seems that the silent moderator tends to make individuals act in a more civilized and restrained manner. I have had firearms in my home but only in the last year began carrying regularly, so here is a good point about carrying for self defense, the firearms had no deterrent effect until it was visible on my person. Even the security guards carrying would be of some deterrent. And of all places that you might have to shoot someone in self defense or defense of others at least medical help would be on site.
I recently had my first surgery under anesthesia and I can tell you that I would have felt much better if my wife had been armed outside the door. You are right about the reality of helplessness and ya, the odds may be low risk, but there is no magic shield around the hospital. It is just such places where the sometimes unexplainable situations happen. I had to fully trust the staff for my well being and safety.