Yes every burglar carries an angle grinder and is not worried making a lot of noise.
Every body leaves there safe out in the middle of a large room allowing unlimited access to the sides.
Given enough time and the right tools one can get into anything.
Most burglars are the smash and grab type get in grab what ever is loose and get out.
—and that was no “thousand pound safe” either as easily as he pushed it around—
I have some experience in this - on the end of preventing break ins of safes and stand alone security containers.
Thieves will buy the safe, take it apart, and figure out some way to get it in.
I had one experience in which all the thieves had to do it to drill a hole in the side of the safe, at just the right angle and position, and then insert a rod to hold a flap the certain way, and the dang door would pop right open.
The drill bit had to be less than 3/16 inches in diameter and THREE AND A HALF FEET LONG, but with a proper jig it was just less than rocket science.