I mean, you can't blame them. It's not like there was any recent precedent for a large thundering superpower to start a conflict (not a "war", of course)--under the assumption that a quick decapitation strike would end things in a few days--with an underestimated asymmetric adversary (one supported by a larger enemy) that responds with cheap drones and the like, resulting in an increasing quagmire, not to mention one resulting in the loss of valuable and irreplaceable airborne command-and-control aircraft during the conflict

The USA military is subject to civilian control and whim and that's their contract. Gauging approaches to have best effect would involve coordination among the political, intelligence, and military glamorati, and that's something that could never happen in the environment of the past year.