That thing is loud, noisy and would probably throw enough sparks to catch my carpet on fire, the last time I checked a smart burglar doesnt want to draw attention to themselves, evem then it would still take a while to cut through. And who wants to steal something they already screwed up because the they cut in to far and damaged the contents
To say nothing of the fact that a man walking with one of those is more likely to catch the attention of neighbors. Possible is one thing. Probable is another. Most of us have limited resources and must manufacture our protection based on the highest threat probabilities since we don't have the to do so for any and all possibilities.