Buck and I have the utmost respect for EMTs. Even though we live in a small, rural area, our EMTs are some of the most highly trained in the state. They are continuously learning and keeping themselves abreast of the best and most recent techniques, etc. I wouldn't hesitate one minute to trust them with my life.
When it comes to an EMT making a mistake and being blamed for it, unfortunately I think some of that mindset is spawned by our country's obsession with lawsuits. As Paul Harvey says, we've become a country of "sewers," which is a shame. Yes, mistakes do happen. They also happen in the world of education, engineering, sales, just name an industry. I can see your point because EMTs jobs require working within the world of life and that can be scary.
I say this after coming from a medical background myself. My father was a physician (read that country doctor) and my mother was a nurse. I, too, spent several years doing floor work in our local hospital.
As for your son pursuing a career in medicine, perhaps his dream of becoming a doctor has not been derailed. He may be able to use his time and experience as an EMT as a foundation on which to build his life's work in medicine. You don't say how old he is, but it's never really too late at any age to follow your dream.
I'm sorry you don't trust your own physician. I have been blessed all my life to have, in my estimation, the best doctors ever.
Best of luck to your son. And, chin up, wouldn't it be wonderful if he did become a doctor and became the one to find the cure for a dreaded disease? The sky's the limit!