In my student days there was an entire street scheduled for expansion that had 80 odd houses down one side as cheap rents by the main roads department, I shared a house with seven other students, four were medical, none came from any privilege other than relatively secure working class - two came from farmers, one from a boilermaker, the other from a telecom line working family.

There are people willing to work long hours for little return with the prospect of a better job after an apprenticeship.

Medical degrees are offered globally, not all locations only allow the children of privilege to become doctors.