Companies profit but citizens lose out. Those two entities should not be conflated. This is akin to the outsourcing of many industries such as pharmaceuticals and medical supplies to countries that do not have the same worker or health regulations as the US.

The visa workers are second-class citizens and exploited by companies to keep cost low. It undermines all workers and in the long run undermines all nations involved. Take the US's relationship with China manufacturing where China has some of the worst pollution and is one of the largest world polluters as they do not adhere to any of the same regulations that nations of the west adhere to.

Currently there is the narrative that the US has a shortage of talented STEM. This is untrue. The shortage is due to a skewed labor market that suppresses opportunity for US citizens in the same way that a US manufacturer wouldn't be able to compete against a Chinese manufacturer not because we don't have the technology, demand, or resources, but that the difference in regulations makes it more costly.