I believe you are stretching a point when you start to compare planned activity (attacks) with unplanned activity (accidents). The only comparison is that both results in loss of life.
Plus I have never contended that we should not attack others because there might be loss of life. I would contend how we attack other may be more to the point. Carpet bombs, while very safe from 25,000 ft is not very discriminating when on the ground. Missiles, however accurate, is not very discriminating when information given is not accurate. Having troops on the ground is far better in trying to save civilian populations. It is also far more dangerous to our soldiers. Really a hobson's choice isn't it for the discriminating person.