Medical training did not teach me what I really needed to know
I have one vivid memory of medical school: being taught basic sciences by people who were neither teachers nor doctors. I vaguely remember being taught about the Frank-Starling curve in the first year. We stimulated a real myocyte at various lengths and measured its contraction. In fact, we did lots of rather bizarre experiments, but no one mentioned what relevance they might have to real life. I threw all my physiology notes away triumphantly after passing the 2nd MB (preclinical exams).
Later at medical school, I was taught to take a history, perform an examination, and then make a diagnosis. But no one mentioned that this would be inappropriate when faced with a critically ill patient. In fact, no one even told me that tests do not make a diagnosis. I do not recall ever being taught about oxygen (except that it's dangerous), arterial blood gases, different fluids and fluid