In fact, I hear this is continuously a problem for well qualified , practicing, and established physicians to migrate to the US. They are fed up with their own home countries lack of security, opportunities for their children, freedom etc, but they cannot imagine going back to medical school to be accredited to practice in the US.
This does not apply to every country. Notably, 4, all here:
https://www.theabfm.org/become-certified/i-am-certified-coun...
While many foreign physicians will have years of experiences diagnosing, treating patients, and administering medicine, in order to practice as a US doctor, it essentially requires them to start all over again academically, especially when the curriculum differs from overseas qualifications. [1] https://www.fnu.edu/foreign-physicians-work-healthcare-pract...