[delinka]

The goal of your [physical?] security shouldn't be to be uncrackable, but to delay the would-be criminal long enough to be detected and, hopefully, apprehended. "Yes, the lock can be picked in a week, but by then, your employees should have returned to the office and noticed the burglar picking away at it."

It's easier to just walk into the open bank, masked, and make demands. And there's still a chance to get away with it. A chance, however slim.