Good answer. Save for the part about kids. I think that's a little bit too broad a statement. But yeah good hiding spots all around your property gives an obvious advantage in the event of intrusion.
I'm not saying that there is a handgun located in every room in my place, but if there were it certainly would not be inside some case.
An oldie training exercise: put away all the real guns just so nobody gets confused like the cops often do. Arm yourself with an pellet gun or a water pistol or even a banana. Put it in the storage/safe storage container of your choice. Do your normal at-home activities. Have your training partner burst through your (unlocked unless you really wanted to replace it) door armed with their pellet gun or water pistol or banana. See if you can get to your container, open it, and shoot to stop your training partner before they are on top of you.
Which is why if there were a gun in every room in my place I'd still also have my EDC handgun in its holster which is on my side.
And also why I train to draw and shoot from my recliner.:uhoh:
As for hiding guns around the house in the hopes that some burglar will miss one or more of them? Conversations I've had with cops who investigate such incidents reveals that if they find one gun they will literally tear the place apart looking for more guns. The recommendation is to lock them all up in one place/thing that is going to be difficult for the burglar to take away.
stay safe.