Upon further reflection, I think it's not so much about human vs physical capital (and I agree with your point), but about IT workers vs other types of workers.

If a company of 5 Indian software engineers is booted out of the US, they can get together anywhere else in the world and still develop a product to the same standard. By contrast, other workers have "stickier" skills that tie you to a specific country. An Indian aerospace engineer may find it hard to find work in India, for example.