I was ex military and trained to handle weapons of all sizes. I got back into guns for the fun of shooting, but also for personal/home defense. I work solo in my shop all the time and don't want any surprise "walk-ins" especially when I'm working on the machines, so I carry my Sig (SP2022 9mm) with me all the time (loaded but not chambered)
At home my wife and I do foster kids and right now we have 5, and three of them were from a particular case where the bio parents (and immediate family) are violent criminals. Even the kids' lawyer even gets nervous whenever she's in the family's area. Granted they are 40-50 miles away from us, it doesn't make me feel any safer. I keep the Sig within reach just in case, and have my 5.56, 300AAC and 308 mags fully loaded.
Safety does mean taking things into perspective especially with kids. Two of my kids have ADHD, one severe. That one (just turned 7 last week) can figure out almost anything. He figured how to operate the AR15 lower receiver I had lying on my desk in under 5 mins even though I had the safety on. I keep my bedroom locked all the time (auto locking combination lock) specifically to keep the kids out and that's where all the firearms are kept unloaded and ammo/mags are hidden in a drawer out of sight.