The US navy has more tonnage than the Chinese and Russian navies combined (which isn’t surprising considering most of the Chinese navy is basically fishing boats with guns attached, and the rest is small low-quality chinesium boats that wouldn’t be able to withstand a kid throwing a few rocks at it), and the US navy by itself also has a larger Air Force than China’s actual air force (almost half of which is helicopters anyways, practically useless for combat in the sea); although if you consider the entire US Department of the Navy (which is Navy + Marines) then they’re the 3rd largest air force in the world, behind – you guessed it– the US Army Aviation Branch (mostly helicopters though) and the US Air Force.
Then there’s the fact that the US has significantly better military technology available & experience to use said technology and to create more technology, along with the resources to actually utilise it; the same can’t be said about China and definitely not Russia. Most Chinese military “innovations” are basically terrible knockoffs of American technology.
Plus the US military has significantly more skilled and higher skilled people available in the military, while rivals (China & Russia) have extremely corrupt military leadership, very little modern combat experience (relative to the US), in general just a very low-skill military and small pool due to authoritarianism & nepotism, practically zero capabilities outside of a small area from their territory.
Based on all of that it’s safe to say that it’s practically impossible for the US military to be “spread thin”, there’s no way for anyone to take air & naval superiority away from the US in any location. The US military has more jets, helicopters & naval vessel displacement than the rest of the top 5-10 countries combined. With those vehicles having significantly higher quality (and having been tested out in combat, having issues ironed out) thanks to the US MIC being extremely competitive&lucrative and not really having crippling nepotism or anything similar to that of China/Russia. The US logistics network needs reworking now but it’s not that bad lmao. Especially compared to rivals.
Also China is objectively in the wrong here lol, they’re directly attacking random Filipino boats for no reason other than China’s illegitimate water claims. China loves attacking its dear neighbours constantly because of its shitty authoritarian & imperialist government.