If you look at the results, the former Axis powers have a very high standard of living and when it comes to our current military interests, the United States provides the bulk of troops for operations, preventing our troops from coming in the line of fire as much by a huge factor.
We are also protected with nuclear weapons in the event of nuclear war, or needing deterrent, not having our own nuclear weapons, keeping any blood from our hands. It also makes us less of a target for hate.
And the fact that we don't have such a huge profile in terms of culture projection makes us again less of a target to people hating foreign cultural influence.
If only these recent military campaigns were successful in reducing hostile forces, it's a tragic waste of the people fighting for us.