Defense guns are accessable...doesn't make much sense for them not to be. Hunting and collectables are mostly in the safe(s). Don't have any small children around. When my children were small,I took the apparently unheard of step to teach them not to mess with firearms, unlessI was present. I did render my defense guns somewhat safer (auto-pistols required slapping the magazine home and cycling the slide, revolvers were stored with a speed loader in the cylinder, needed to dump the speed loader and close the cylinder). Adults familiar with guns can do so in the dark, under stress, very quickly,but young children are probably not going to be able to in any reasonable time. Children under 10 or so will also not usually have the strength to cyclethe slide on a 1911, anyway.
When children came to visit, guns were stored out of sight and reach.

Unless my doctor was a shooter, I suspect I would tell him to concentrate on his specialty and keep his mouth shut about things he didn't know or understand. Knowledge in one field does not carry over into others.