It's basically the same question, as what's the harm in convicting an innocent person or what's the harm of getting a bad tip and searching the wrong house. The freedom from the arbitrary use of government is a basic human right and we have a system which is intended to protect us from such intrustions. If you don't believe in basic human rights, there's little I can do to convince you of their necessity.
I'm not sure why you persist in questioning my value system. I have asked a simple specific question that you are unable to answer without claiming other examples as the same thing. In the abstract sense I suppose a point is being made but it isn't very weighty given its disregard for proportionality and context, among other things.