GPUs aren't built in the US, though. I wonder, what percentage of all the stuff in a typical datacenter is actually made in the US
The margins collected by Nvidia end up in the US. And Nvidia and its employees get paid in the US. Only a small part of the revenue is outside the US.
But there is much more to it. This is a nice paper for an overview: Hallmarks of Cancer (tng) [0]. It (among others) adds the very important and for years underestimated role of the immune system to the original 2000 paper.
[0] https://www.cell.com/fulltext/S0092-8674(11)00127-9