We don't have one.
There are any number of things we could buy to address potential tribulations.
We do some, but not others.
Do you have one?
Why?
I don't have one myself.
If a rational person is concerned with keeping their family safe and healthy but only has limited funds to do it (like we all do), they would go for the purchases that get the most "bang for the buck" in terms of safety benefit per dollar spent before going for purchases with less "bang".
OTOH, someone who was approaching the issue emotionally instead of rationally might pick a purchase that appeals to them for emotional reasons then try to rationalize it after the fact.
I'm interested to see whether the pro-gun people here weighed their options and really did decide to prioritize one expensive option (firearms) over another one (an AED) based on some sort of criteria, or if they jumped to guns without thinking much about the big picture of family safety.
However, we can't infer how a person prioritizes one over the other if they have both a gun and an AED or if they have neither.
The reason I picked AEDs specifically is that it addresses the same issue that has already been brought up: 911 can take a while to respond.
Personally, I've never been caught waiting for police in an emergency, but I have been caught waiting for what seemed like ages for fire and EMS on different occasions.