To paraphrase
multiple authors

Iraq, Afganistan, and other failed state/ Civil conflicts are usually generational in duration 15-25 yr before the world opinion/press bequeaths stability status.

The real question is will passive low cost involvement achieve a similar result to intensive high cost active involvement?

Likely the intensive high cost active approach induces more change/growth in a shorter time frame on the U.S. side of the equation than the alternative would.