By this logic, Google should relocate to some abstract "global" location.

The law forces American corporations to hire Americans, various work visas are exceptions from the law given under certain conditions. It appears the companies are abusing these exceptions and violate these conditions. There is no such thing as a "global company" in the law, with the exception of foreign consulates all the entities that hire people in the US are American corporations.

Humans were motivated to discover physical truth, invent technology before Google existed.

"Why is it important Google exists?" is a more interesting question.