I was raised in a house like that; firearms in corners behind outside doors, in gun racks in the house and in pickups- then pistols in nooks and crannies. I have no idea how dad trained us kids to leave that all alone, was too little to remember that training but would have never touched any of those firearms or anything related to them in a million years. I remember him teaching us safety and how to shoot when we were older but don’t remember the early toddler training we had to have. I was not necessarily afraid of firearms- just knew absolutely that I had to leave them alone.
We had a rule that I was certain would be enforced - touch a gun without permission, and you’re banned from shooting for a year. That is such an incredibly long time to a kid that none of us would have dared to break that rule, and I don’t think that punishment was ever imposed. We didn’t have guns very ten feet, but there were more than a dozen guns in our home. I hope the pendulum swings back in that direction in our society.