Actually, the more plausible scenario in the event of a physician shortage is to IMPORT them from overseas.
Here in NYC, I see a lot of nurses from overseas that have taken the nurses exam and after passing, are allowed to practice in the USA.
They’re from all over the world — Philippines (the most), South Korea, India, etc. Many are MALE in fact ( for some reason, male nurses are very desirable, as are male physical therapists).
The same thing will happen for doctors ( as they have happened for nurses ).
One reason why male nurses are popular is because they have the strength to pick up and move heavy patients. As for foreign doctors, that has been happening for years. Almost every GP around where I live is from India or Indonesia or somewhere.