If it didn't cost a quarter million dollars to become a doctor then it'd be a more reasonable proposition. If disadvantaged people had access to technology, extracurricular involvement, and inspired teachers who could think beyond making ends meet in a fucked up situation then a lot more doctors would come from those places.

If medical supply chains didn't have to compete with MyPillow and big box stores for the manufacturing capacity when supplies get tight, you could probably make sufficient medicine. Distribution has been made more effective than ever with the speed of communication today and multiple redundancies. We have computers and barcodes to track supplies. We manage to get Amazon to work. If you get some roads to turn into trains suddenly you have transportation for critical supplies the likes of which have never been seen before.