We see what you're trying to do--the problem is that the general "think of the one terrible case" has been tarnished rather heavily in the last decades by people talking about "well, what if it stopped 9/11", or "well, what if it stopped the OKC bombing" and so on and so forth.

The idea of "well, in this one specific extraordinary case it's totally reasonable" is kinda played out among anyone with half a brain, because it's been used to justify so much bullshit.

Also, the entire dichotomy of warranted/unwarranted is suspect, but that's a different rabbit hole altogether.