The real reason why there are fewer doctors is that it simply doesn't make any economic sense to be a doctor anymore. You need too much school, at too high a price, and you push off any real earning potential 6-9 years away from your peers. If you specialize, you can add an extra 2-4 years on top of that. And you really don't make enough over the long run to justify the lost opportunity costs.

So yes, there is a shortage of doctors, but that isn't going to change anytime soon.