Empires fall from within. Yes, nobody will stop the US with military, and nobody would try because that's not how you win. You don't need a big military to crush the fragile supply chain that a plane like this demands.
Who says it has a fragile supply chain anyway? It certainly has a complex one, but then so do things like nuclear weapons and nobody is clamouring to abandon them on that basis. Protecting that chain and the logistics around it is a staple of military operations. It’s not like someone is going to surprise them by going after supply chains.
If the US is unbeatable militarily then you, as a poorer advesary, don't try to match it, you use one of the other avenues like causing political de-stabilisation for example, interfere with elections maybe.
Therefore is the military persuing "perfect" at high expense instead of "good enough" at a lower expense which would still be good enough to fulfil its requirements.