O-chem is useless for practicing physicians. Took it, did OK at it, passed the required tests in undergrad and early med school, never used it again. Licensing boards understand this; there is no organic chemistry on the final board examinations for Internal Medicine.
In fact, thinking you understand low-level chemistry and biology can be dangerous for a practicing physician. For example, beta-blocker blood pressure medicines slow your heart rate and make your heart "squeeze" less strongly. We were initially taught that you should never give them to patients with heart failure -- their hearts didn't beat strongly to begin with. Given a basic understanding of the underlying biology withholding the medication made sense. Until someone studied them and found that for patients with mild heart failure beta-blockers reduced hospitalizations and death. And we had been withholding them for years. Whoops.
You don't want your doctor prescribing things based on their understanding of biology. You want them prescribing on the basis of clinical trial data and statistics.