Where I come from those are called gun cabinets. I have one mounted in a wall and it can't be seen when the bedroom door is open. I keep the home defense in that one only when I am at home. When I leave the house it is empty and open. And yep, someone with a couple good sized screw drivers would have it open in a minute. Which is 59 seconds slower than my dog could chew threw a human leg.....
My gun safe would take a lot longer to open, and several people to try to move it. A very experienced locksmith that was well recommended by the FBI took almost an hour to get into it. I know because it had the electric lock mechanism. The linkage stripped inside so there was no way to open it. It cost me 600 bucks to have the locksmith open it and fix it for me. And he did not do it with a drill from Walmart or a sawzall. The drill bit cost almost as much as I paid for my safe, and I bought it used.