He was a psychiatrist for a few years. Liberal arts majors becoming physicians doesn’t seem unusual. He still speaks French to his mother.
Lots of med schools are catching on to the fact that true liberal arts majors can think very well and have a balanced educational foundation and are good at thinking through ethical issues.
Liberal arts majors who become physicians is unusual. They essentially have to get a science BS in addition to their BA, by the time the prerequisites are done, and usually are prouder of the BS than the BA because it represents so much more in the way of effort. I know an MFA who eventually got an MD.
And I know lots of MDs who got their law degrees later. It was a piece of cake to get a law degree after med school. What I have never met is someone who got an MD after a law degree, proving to me that lawyers are, by and large, really dumb.
Now, I didn't say I knew absolutely that CK didn't take much in the way of hard science prerequisites. But I do know of well-placed people getting into med school without prerequisites.