But usually the thing that's locked up can survive even less brute force than the lock -- a storage unit near mine was broken into, and the unit owner (who was there with the police) said the thieves just pried off the storage unit lock, the sheet metal door literally tore and the entire locking mechanism came out.
This was an outdoor unit, the thieves came in over the fence (the barbed wire on the fence didn't slow them), and left the same way. If I had anything valuable, I'd keep it in an indoor unit where at least there's a locked door in the way.