That’s basically because we have the politicization of warfare started by the Democrat President LBJ during the Vietnam war and we couldn’t just get in there and flatten Afghanistan and occupy it for decades like we did Japan to rid them of their radical religious ideology. We got literally nothing to show for our blood, sweat and tears effort in that region when after 18 years we could have been more then halfway to a complete transformation and reformation of their barbaric religion and life style.
America unlike other countries does not occupy forever, we conquer, we occupy, we rebuild and then we give the country back and the 30 year occupation of Japan is the perfect example of that success formula which we will never have again as long as leftist progressive liberal Democrats are voted into political office and power since Dems are hell bent on never making America great and powerful again!