Oh blow that shit out of your ass. The United States has a lot more to worry about than any other nation on the planet because the United States guarantees the continued existence of the technological wonderland we currently live in. Places like China benefit massively from the near-crippling costs the United States incurs by making sure freedom of navigation and equitable trade are a thing. Yes, the US benefits from this but so does literally everyone else that chooses to participate. The United States and its president absolutely have a responsibility to keep the fundamentals of the national economy in place because that allows it to ensure the world economy remains somewhat stable, like it or not.
The United States holds ultimate power on planet earth and pays dearly every moment it continues to do so. Yes there are unique benefits that only the United States enjoys, but there are massive benefits all-around that a nation like China in its current form would never be okay with. For some nations, nobody else is allowed to do good if it means that the homeland only gets a 9/10 on the "how good is this for us" scale when it could be a 10/10 and everyone else can screw off.
Can you even fathom how much worse this whole situation would be if the US decided to scrap all of its carrier strike groups to balance the budget and let the world figure it out? Who is going to fill that gap? The Chinese? The Russians? The Europeans? Get real, dude. It would be a golden age of piracy that would make Henry Morgan blush... right before he died of the China Virus because the medical precursors to make his pills are stuck 4000 miles away, the tubes for his ventilator are somewhere in bumfuck Europe, and the fabricator in Milwaukee can't get the bolts he needs to fasten together the hospital beds because the ship carrying them got shitslammed by a bunch of Russian Yaks and dragged into port somewhere.