I think it’s just a shift to knowing you need physical security because the cops can’t or won’t do anything.
You see the same thing in Europe and South America.
My house is not a fortress, but it’s remote and I live in a forest that periodically burns. So, when I built it, I built it such that it would be hard to break into by someone using tools and having some time on their hands — plus fire resistant.
The walls are concrete covered in stucco. Lots of steel.
Windows are all on the second floor, have lexan cores and steel frames, plus the dividers are actually bars that don’t look like bars. Metal electric shutters (like you see in a hurrricane area) come down obstensibly for storm and fire protection, but also help with crime. These go down at night.
Doors are all metal, solid core, with metal frames, and double-cylinder assa-abloy locks (unpicksble and you need a key to get out). We also have light bar doors (mainly for bears and bugs if we want to keep the door open and not have a visitor). Doors also have a floor kick lock.
Double thick (2inch plywood) roof, thick fireproof layer, with a low gauge metal cover (that’s mainly for fire). Spray foam insulation.
Commercial garage doors that can’t be “popped” using the hanger and triangle wood method. Also insulated. Locked door between garage and house.
Yes, cameras and alarms, all wired and call local security by cell.
And and locked property gate about a mile from the front of our house that discourages idle visitors. Can’t see our house from any public road.
Zombie proof? No, but resistant to all but someone specifically targeting us.
Um your house does sound like a fortress. :-)