Some of them are barely better than a paper bag. LockPickingLawyer has opened many far too easily.

Gun safes are particularly bad most of the time. Many of the big ones are super thin sheet metal on top of a sheetrock core. And the small ones just get stolen with the guns in them.

It's actually why I keep my pistol in the cash safe in my used commercial van. The safe's surrounded by an additional steel box on all 4 sides with the door facing up and bolted into the car body the in a way that you'd have to open the safe to get to the bolts, with the other side of the bolts located so you'd have to remove the gas tank to get to it.

The van was actually stolen once before I owned it, and the thieves never did get to the cash in the safe, so I figured it's a more secure place for my pistol than a safe in my house.

I'm also usually pretty close to my car, whereas I'm away from my house for long stretches.

That's why you keep the guns and ammo separate.