Yes. As a US citizen, I, and many of my college cohort, spent many years unemployed during that time period, despite applying to thousands of positions.

The reality is that businesses hire attorneys to create a legal fiction that I and my peers are unqualified so that businesses that desire it can hire H-1B employees.

Shortages are, always and everywhere, a pricing phenomenon.

During this period, many job opportunities went to h1b candidates, resulting in teams at FANGA companies with all 1 nationality.

It would be fair to say that they couldn't find any american talent and thus needed to hire h1b workers, but that wouldn't explain how they got monoculture teams.