If they go others will take their place. I don't think you really appreciate the rest of the world's perception of the US economy right now. Check the value of the US dollar against any currency you like. From the outside looking in, everyone can see the US economy is performing better than any other pretty much. While many other nations are still struggling to achieve any sort of significant gains in growth following the knock on effects of the pandemic, the US has had no such problem, comparatively.
And guess what, despite all the doom and gloom you've been hearing, the American people have been behaving as though they're pretty damn confident in the economy too, and it's basically the main difference between you and, say, Canada, whose recovery has lagged and now looks to require at least another year or more to get back to more than 1 percent or so of real growth.
The proof is in their spending habits. During the pandemic, people saved money like mad for lack of fun places to spend it. As soon as things opened back up, so did their wallets. Despite high interest rates, inflation, and the rest, consumer spending has remained high ever since, which has in turn kept the economy chugging along. Contrarily, in Canada, for example, Canadians currently have about 75 billion dollars sitting in the bank due to a lack of consumer confidence. Analysts expect people to loosen the purse strings with tine and with lowered interest rates as inflation has continued to decline and now sits at 2.9 percent, so pretty close to the target. We'll be ok, just not as soon as y'all managed. Regardless, the reason for the difference is clear.