There's a stronger case for world hunger being bottlenecked than healthcare. World hunger is a logistics problem now, but no amount of money lets you print doctors.
What’s the joke? “What do you call the person who graduated last in their class from med school? A doctor.”
Certainly the most skilled and advanced in the medical field will need significant schooling but there needs to be a major reform in healthcare training. One that produces more knowledgeable and skilled professionals and not a glut of questionably competent nurse practitioners.