Oh please. They game competitive wages, make the position ridiculous in terms of requirements, or give it abusive attributes nobody with self respect and freedom would accept, write descriptions to match specific people, compare to lowest common denominator, and "advertise" the positions in places nobody will look, etc.
Let me give you an example: A university near me hires postdocs on H1B despite there being an absolute glut of postdoctoral researchers available. They count some of the University benefits as contributing to the salary despite not being part of pay, and make the job requirements list items impossible to fulfill unless you've already done work with whichever researcher is hiring by making "experience" with their one off research projects or very narrow (but not hard to understand) areas of expertise a requirement.
The whole thing is an absolute joke and is used to import workers by the bucket load.
Often times entire labs will be from the same country as a researcher despite them mostly doing lab grunt work undergrads could be trained to do in a semester or less.
Mind you I'm not against foreign workers, but the H1B program is an indentured servant sham.
It's easy to fix, though. Accept H1 apps based on compensation: high pay to low, no lottery, and grant green cards after 18 months work.