It is true , I have seen master safe crackers, break into formidable expensive safes. On video of course. which one would think, would be impregnable. Some are drill proof flame proof, and break in proof, not as easy as in the video. But every build has a weakness. And $$$$$$ that is spent. The design, the materials used. How it is fabricated. I supposed thief's look at the risk vs reward. I am sure some safes are fabricated with sandwiched fire proof materials. And impossible to pry open.