No, really they aren't. Doctors are to biologists as engineers are to physicists.
(By doctors I mean people who practice clinical medicine, and not physician-scientists, obviously.)
Sure, but your future profession is clinical medicine, not basic biology. Nobody learns anything in an undergrad curriculum that has clinical relevance and yet isn't taught in the first two years of med school, at least not according to any MD I've ever heard from.
This doesn't make any sense. If such a correlation existed it would have been published somewhere, don't you think? Or perhaps the AAMC, CIA, and Freemasons are suppressing the information? Why would med schools value diversity in majors if it were known to detract from the quality of education? If they really thought it was important for doctors to know P-chem, why wouldn't they either teach it in med school or require that applicants take the class?