My guess is, the vast majority of burglars just want in and out with a minimum of drama. They don't enter occupied houses. It's a business to them. The less risk the better.
Unless they are whacked out on drugs and DGAF whats happening at that point in time. Then you've got a problem...
The DIPCHIT ADD, after a morning of drinking:
You despair, repeatedly, constantly! daily basis? A despair ninny. Sack up, despire ninny.