To continue your analogy, 1000 other potential robbers are trying to get in every day, you are virtually always on holiday or otherwise outside the house, and the window was voice-activated. The intruder said a well-known special phrase which caused it to open. The expectation is that you've checked the windows, door, lock, and any other potential openings yourself to make sure they can't be entered like that. So yes, I'd say the person who doesn't take the valuables and run is doing you a huge favor.