Intellectuals should plain avoid institutions and people who want to use them for their brains.
What ends up happening is you're drawn in to the abstractions and theories of the profession, and then they foist minutiae on you until your burnt out or altered to suit their scene. They drain you (basically) and fry your brain and immune system for their own ends. Sounds dramatic, but that's the reality, or at least my perception of it.
Essentially, what I'm saying is there should be some altruistic aim coupled with a thirst for information if you decide to go to medical school because you have to wade through shit before you have a modicum of autonomy. Man, that's biased...anyway, academia can be a cold place.
What I would do in your case is keep my career and limit my hours, granted you have the economic means to do so. Well, I guess my main question is what's motivating this reinvention or switch in careers?