You come into the US, but entirely as a kind of guest worker. You demonstrate you have great skills and work ethic, but there’s no path to permanent residency or citizenship. The relationship turns exploitative. So you go back home and do great things there instead of here in the US.
We could have had a smart, productive addition to the American workforce through a more thoughtful approach to immigration. Instead we gave you up to your home country. Your home gain a skilled and experienced knowledge worker bolstered with your experience at a US tech giant, we cycle in the next H1B to repeat the cycle.