Yeah, there's no way to know for sure what would've happened if we took a more conservative approach to terrorism. But the only reason I spoke up is seeing macbill's post that we lost 7,000+ Americans in combat. Plus another 30,000+ after we broke their brains over there. There's probably an even higher number who will deal with life deranging injuries for the rest of their lives. Then there's the multi-trillion price tag. No way to know for sure. I just doubt that us doing absolutely nothing after 9/11 (except for securing cockpits/air marshals) would've lead to a terror attack that killed 37,000+ Americans and caused trillions in damage.
Listen I get it, and when it comes to how we handled things, I know we could have handled it better and more effectively. Not going to pretend that we did everything perfectly.
Unfortunately I know way too many men and women who had given their lives, or taken their own years after coming home and, while I can't speak for all of them, I don't think that any of them would have been okay just "doing nothing." Same goes for those who were injured.
War is a nasty business and people will get injured, killed, and it brings along an ever-growing laundry list of awful things. Our servicemen and women sign a contract fully knowing there is a chance that they don't survive the next 4 four (or more) years. Historically we've had some rough wars and it would be foolish to believe it can't happen again. Sure they could think they're getting into an administrative job, or a chow hall cook, but there has been times where people in those jobs have been called on or caught in a situation and had to start slinging lead at some bad guys. Not remotely as often as somebody in a combat position, but it does happen. That is the thing about a 100% voluntary force right now, everybody made their own decision and signed up knowing the risks. War is never a "good" thing, but evil does exist in this world and it does, occasionally, have to be extinguished.
The type of person making that decision, imo, would never be ok without an actionable response. Personally I can't even fathom not responding to a terror attack with anything less than overwhelming direct action. It's more than just, "some people did something," and the way I see it, you attack the United States, you should expect to have your world turned upside down