That describes most of our weapons: brilliant against barbarians, under certain circumstances, but generally useless and certain to be destroyed in the first minute of a global conflict with another major power.
What other major powers? There are only two other major regional military powers: Russia and China.
Please provide robust examples to back up your premise. The last large conflict between US weapons and another competitor, resulted in absolute humiliation on the part of Russia/USSR in the Gulf War.
Russia can't globally project its military and neither can China. Russia can barely leave its borders and can barely afford to even in a limited fashion. Neither comes close to having the logistics, bases, comprehensive weapons systems and information systems necessary to fight a war outside their borders against the US. They simply can't do it under any circumstances. China will need 30 more years to get to that level at the rate they're going; they still haven't properly modernized their military, much less figured out how to use that modernization effectively.
Russia's entire military is rotting top to bottom. Putin has shifted Russia's focus to a narrow selection of propaganda heavy 'super' weapons, because they can no longer afford to maintain their military to keep up with the US broadly. They can't afford the SU-57, it'll never be constructed in meaningful numbers. They can't properly maintain or sustain their one aircraft carrier. Russia is no longer a broad military rival to the US, they're a narrow weapons systems rival (eg the excellent S missile systems).
Things are not going to get better for Russia on the military front, they're going to keep getting worse in line with their permanently stagnate economy. They'll have to make a choice on cutting the size of their military (further limiting their capabilities to mostly defense of Russian territory), or allowing the average quality of their forces to continue to erode. A $1.6 trillion economy - smaller than Canada's economy - simply isn't going to enable them to keep up over the coming decades with the US and Chinese economies.
China is the sole military rival to the US going forward. As of today, they're still solidly behind the US in nearly every weapon system. Maybe in a couple decades the story will be very different (one assumes), today it's not.
I think this is a bad misunderstanding of what makes things effective in war.
Yeah, we can count tanks and planes and bases, mobile or otherwise, and declare that the US would win in an overwhelming fashion in a WWIII scenario. But I think that assumes we'd be fighting based on our terms - which never happens in war. I don't think it's consequential, at all, that Russia and China struggle with the carrier vessel concept. These "super weapons" that are supposedly just Russian propaganda would render these things obsolete. Chinese cyber weapons knocking out US military communications systems would be catastrophic. Let's also not forget the very regrettable state the US Navy itself is in[1]. This is simply to say that I think you're overstating the primacy of the US military today for fighting a "conventional" style war. Actually, between the three countries only Russia has done so, fight a "conventional war", in the last decade or so when they annexed Crimea. The US has been engaged in a forever-war of "Counter Insurgency" that most assuredly has atrophied both experience and technical skill for fighting great land wars. I'm not saying it's an even playing field, but I would not underestimate Russian or Chinese ingenuity to exploit weaknesses here.
I also figure that a WWIII scenario would be much more like WWI than WWII, since there will be a myriad of new technologies all clashing together for the first time. I don't think anyone can say for certain today what trumps what. Do hunter-seaker drones take out infantry platoons faster than they can be replenished, or do EW units - something that's never actually been tested against these adversaries - knock out the drones first?
The God is on the side of bigger battalions and US battalions are MUCH MUCH MUCH bigger. It is a matter of spending in the end. US can outspend Russia and China combined without even noticing. In 20 years.. well we have no clue what will happen in 20 years.
