> I figured we could use more doctors because doctors are so busy and expensive. Economics 101 type reasoning. Am I missing something? Would having more doctors not be a good thing?
I never said that it wouldn't; I said that having more medical schools would have literally zero impact on the number of doctors practicing medicine.
> Do we really have tons of MDs running around who aren't allowed to practice medicine?
Yes, because medical school isn't where you learn to practice medicine; residency is.
> Then we should increase residency programs.
There are so many political barriers to allocating the kind of funding necessary for this that it's not a realistic expectation anytime for the foreseeable future.
> I'm no expert in the field, just seems to me like more doctors would be a good thing, same way it would be good to have more of any profession that's highly in demand.
Sort of - but the medical field is rather complicated to a degree that would be tough to summarize in an HN comment. In short, yes, this general principle is true, but in the case of medicine, there are enough confounding factors that it's not as simple as "more residency programs → more and better care". If you could hold everything else constant, yes, that may be the case, but in practice, this wouldn't happen in isolation, and there would be a lot of other effects.