I think the most recent wars we've been involved in have been very tilted towards standoff weapon strikes. I suspect, although I don't think there are real numbers to really look at, that the vast majority of deaths over the last few years in wars the US has been involved in have been from weapons where no pilot was physically in danger.

To your last point, I think we've reduced the civilian death toll greatly by use of precision weapons. Compare what we do now to what was done in WWII or even Vietnam to an extent.