USA need some new young chess prodigies current G.M. not getting any younger!!?

No worry: they will lure some talents from the rest of the world.
Caruana is Italian, Nakamura is Japanese, So is Philippino, Aronian is Armenian, Niemann is Dutch...

America is a country built by immigrants. Don't worry, they will import some players from other parts of the world.

No worry: they will lure some talents from the rest of the world.
Caruana is Italian, Nakamura is Japanese, So is Philippino, Aronian is Armenian, Niemann is Dutch...
Hikaru's enstranged dad was Japanese, but Hikaru lives in the US since he was 2 years old, and he can only speak a little bit of Japanese that he learned much later, in school.
Caruana was born and raised in Brooklyn. When he was in Europe, he represented Italy, but that was mostly for convenience reasons. His Italian is very weak, his Spanish is much better.
Niemann was born in San Francisco. He was an exchange student in the Netherlands for a couple of years, and that was pretty much all his contact with the country apart from the Wijk aan Zee tournament.
Yes I see NO GENUINE USA AMERICAN FUTURE G.M to even remotely represent themselves as the next Bobby Fischer, as you say all they have are imported stars not 100% American players and looking g at the lust they gave it doesn't look too exciting for any future players coming through!!?

Yes I see NO GENUINE USA AMERICAN FUTURE G.M to even remotely represent themselves as the next Bobby Fischer, as you say all they have are imported stars not 100% American players and looking g at the lust they gave it doesn't look too exciting for any future players coming through!!?
Fun fact: both parents of Bobby Fischer were immigrants. So by your standards, he wasn't "100% American player" either. Not that it makes any sense whatsoever.

Everybody comes from somewhere else unless your family tree is 100% thouroughbred Mesopotamian, but if you really want to get anal about it you could make an argument that the first humans must have come from somewhere.
Take... England, for example. The "indigenous British" had to come to the archipelago at some point, but I digress. The 'indigenous' mixed with the Romans mixed with the Celts mixed with the Angles mixed with the Saxons mixed with the Jutes mixed with the Vikings mixed with finally, the Normans. So unless you can trace your family tree back to the original inhabitants of the British Isles, then congrats, you're a descendant of an immigrant.
Does any of the above matter? Absolutely not. If you were born and raised in Britain you were born and raised in Britain, seems pretty simple to me. Same for the United States, who just happen to have a much more diverse immigrant population than essentially anywhere else in the world. They're the "Melting Pot" for a reason.