It's difficult to understand your point given how this was written. However, it's worth pointing out that the Cuban doctor export scheme is, in fact, very profitable to the Cuban government.
Much less so to the doctors themselves, which frequently have to work in what amounts to conditions of indentured servitude. And they have no other option, as working as a domestic doctor in Cuba typically pays less than being a taxi driver.
One has to wonder why they don't just copy the Cuban model of having a surplus of their own slave doctors, especially given the supposed immense profit potential!
To be honest, I'm not convinced of your explanation.
Much less so to the doctors themselves, which frequently have to work in what amounts to conditions of indentured servitude. And they have no other option, as working as a domestic doctor in Cuba typically pays less than being a taxi driver.