@Zarlak
Why yes, we do assume everyday. The problem comes in when assumptions are made with the added ingredient of condescension, which many on this board have done in the discussion on firearm ownership. I am fully aware that I'm on a message board with people who have a radically different view of guns and of personal defense than I do, but I try to do my best to have respectful conversation on the topic, unless otherwise provoked.
That being said, in response to the issue of gun safety...
I can tell you that in no firearms safety or training class I have ever attended have we been instructed to keep a firearm for self or home defense "locked away and unloaded" unless other extenuating circumstances apply, and only then is it simply located in a safer place as an unloaded gun is a very inefficient club. To keep it unloaded is to defeat the purpose. There may be countries whose laws say a gun must be locked away unloaded, but that is a separate issue from actual gun safety.
A person owning guns for self defense who has extenuating circumstances could simply put a gun in a safe location in each room of the house, or have a small biometric safe (the much much more economic option here) that they can just carry with them room to room in order to alleviate the problem of having to ask the home invader to wait for them to retrieve their weapon.
Now, I believe the poor lady I mentioned killed near my parents was killed in her sleep, or at least was asleep when the intruder entered, as she was reported as being found in her bed. In that instance, her access to a gun was rendered moot by her lack of an alarm system. But, the point I was making with that anecdote was to say that the Colonel in the video was much like that woman... Old, never had that happen before, and then it did.