It’s not clear to me whether that’s true on a larger scale. Obviously, innocent people die in war and that’s regrettable and to be minimized. But innocent people also suffer from the instability and insecurity caused by terrorism. Note that while most countries opposed the US invasion of Afghanistan, opinion polling in India—which shares a border with that country—showed a majority of people there supported military action against the Taliban.

Note that leaving terrorism unchecked also has a cost. I agree folks tend to have a perception of terrorism risks that outweighs the actual cost in lives. But while the psychology is in peoples’ heads, the dollar impact is real. People don’t want to invest in an area where terrorism isn’t a risk. People with means and opportunities leave such areas, creating brain drain. The existence of these unstable places like Afghanistan imposes a real cost on the people in surrounding countries.

Innocent people will die in any significant military action. And if avoiding those casualties is the overriding concern, then you should never engage in non-defensive military action. And that’s certainly a very defensible position, but I’m not sure it’s always the correct one.

I don't think people are failing to notice. That's one of the most common complaints.

"I'll tell you what war is about, you've got to kill people, and when you've killed enough they stop fighting."

-Curis LeMay