alt Hacker NewsBig tech companies are biased to sourcing from big name universities that have a lot of foreign students, and big tech companies were much more likely to go through the effort of H1B than smaller companies. As such your candidate pool is more heavily skewed than elsewhere.
All the conspiracies theories can be put to bed by walking into any engineering department (maybe outside of biomedical engineering…which makes me think this may be related to how Americans demonize math) and observing that the majority of students are foreign or maybe second generation immigrants.
This ratio gets worse because American students are disproportionately more likely to follow up their engineering undergrad with law or business school, so even if they may be engineers they’ll get into business and/or something like patent attorney going forward.