I'll take the medic with 5 years of emergency medicine EXPERIENCE over any doc who's been practicing in a barely related field. Internal medicine? Sure, i'm maybe ok with that, maybe surgery or anesthesiology too, but you could have a psychiatrist, a gynecologist, or a pediatrician with absolutely no emergency experience besides a few weeks during their clinicals.
The purpose of a residency is to give a doctor experience in their field before they are allowed to practice independently. This is why you have board exams, to show competency in the field. While we may have no equivalent to board exams and residencies, we do have the badge of experience to show.
In any real emergency, you want someone with real experience dealing with these emergencies. This could be an experienced EMT, a medic, an ER nurse, or an emergency medicine physician . . . it could even be a firefighter or a CNA working on a code team.
@Flight-LP...yeah, that's why I put in the qualifier about this being for the US. After I started writing that, I remembered that other countries are not like the US. Most don't have states, and some don't require physicians oversight for practice.