.....I just don't see any historical or logical evidence for the axiom you set forth as the reason we can't draw down significantly like the US after every single war before WW2/Cold War.
Si vis paccum, parabellum.Having a good sized navy assures we'll be prepared for multiple missions, which may sound wasteful in "peacetime."
Has a nuclear force ever truly been a great deterant, save for the USSR, which had its own and therefor M.A.D. evolved? Osama Bin Laden knew perfectly well we had nukes when he launched the 9/11/01 attack. He didn't fear them because
he knew we wouldn't use them. History proved him right.
China does appear to be arming itself for hegemony in the Western Pacific. Right now they aren't much of a threat but that may change in a few decades.
We got lucky in WW2. The Germans had designs for bombers that could have reached New York City had the war continued on. Many of their weapons systems were better than ours; we prevailed mainly because we were able to out produce them. One of their fancy over-built King Tigers takes out a Sherman tank, we replace it with not one, but two, and later three improved Sherman tanks.
We developed better fighters and uprated fighters in our Army Air Corps pretty quickly in WW2. That is not so easy to do when fighters are supersonic jet air superiority machines with stealth. Look at the F-35 mess and the F-22; we're getting maybe --
what? ? ? -- half the inventory of F-22s we wanted???
The enemy is beginning to devlop and field jets that are every bit as good as what we have and outperform the F-15, F-16, F-18 designs we now have in service.
Carriers are great ways to extend power but they need support craft as well.
One of the reasons why the Japanese were willing to risk an attack on Pearl Harbor in 1941 was because we'd drawn down a lot and they perceived us as weak and indolent; willing to perhaps fight a short quick war then to sue for peace, but unable to fight a sustained war which is what that war devolved into. Thankfully they seriously misjudged our spirit.
I'm not so sure we can re-arm so quickly given how expensive and high tech much war fighting equipment has become....plus our manufacturing capacity is not as spectacular.
While I don't think anyone is going to bomb Pearl Harbor again, and I don't pretend to have a crystal ball that will show me how WW3 will begin, I don't think it really unreasonable to guess that should we wait long enough, it'll happen.
It'll happen when some enemy perceives us as too weak to mount a successful counter offense ......