We ought to be really concerned about a real war with a real enemy if we are still hanging around there 17 years after 9-11 with no idea how to end it and go home.
The only saving grace is the fact that we aren’t getting Vietnam-level causalities.
A real war is way easier - you can beat them and go home. These low-intensity asymmetrical conflicts are way harder. That’s why the army focused on conventional readiness after vietnam and excelled at the set-piece battles against a state army in Iraq I and II, and made a mess of Afghanistan and the Iraqi occupation.