Talent wasted in the US maybe, but plenty of professors across the world are doing equivalent work. To think only the US is capable of doing ground breaking research is extremely foolish and an insult to humanity.
Elite human capital isn't normally distributed.
And neither is the capital equipment of research. The same mind will be far more effective with more resources than without, and when surrounded with similarly-enabled colleagues. (To explain it any other way requires some pretty racist reasoning around why scientific progress was dominated by a small group of countries over the last century or so.)
You sow, then you reap. That's how it goes.
History is filled with episodes where collapsing empires took their knowledge centers with them, where for centuries thereafter the work was in recovering that lost knowledge versus advancing the frontier. It may seem self serving coming from an American. But I wouldn’t cheer on the collapse of an academic institution anywhere.
I wouldn't either. But the world is a better place with I would cheer the of an academic institution to lose its lead when it has deep ties with a military that terrorizes the world.