There are lots of H-1B doctors in the small towns and rural areas that are typically underserved by larger hospitals and networks.

https://www.americanimmigrationcouncil.org/research/foreign-...

> Just over one-quarter of doctors in the United States were “foreign-trained” as of 2017, meaning that they received their medical degrees from schools outside of the United States.

This is one of the challenges of the H-1B visa and that tech specialities are dominating the lottery it makes it more difficult for other areas to get doctors willing to work at, well, rural doctor rates.

if it's anything like where I'm from then you can't practice with a foreign license unless you convert it to a local one. the same organization that make a cap on the number of doctors/lawyers is the one that allows or reject the license conversions (permits). so foreign labors as a loophole does not work. when there were attempts to remove this the doctors went on strike. the justifications is removing the cap on number of doctors by allowing foreign labor would increase the variance in quality of the doctors and increase the risks to the patients.

Programming skills are more universal and don't depend on the country. Whereas lawyers and doctors have different standards and laws to operate on. It would be tough for immigrant to justify to spending 4-7 years studying laws of another country just to take a chance with H-1. If you fail to obtain that you virtually unemployable by your country and need to spend more time learning laws of you country