Could a single unequipped psychiatrist on the street do the same as multi-physician, multi-disciplinary team of a level 1 trauma center with the same speed and efficiency?
Probably not.
Ah, c'mon, why we gotta pick on the psychs? haha.
Well, aside from CPR/collapse stuff, there's a range of what docs can do like just out on the street or at a dinner party.
"Generalists", would be Family Medicine practitioners (everything from birth to death), Internal Medicine (weird name but basically adult medicine, 12 yo and up, no babies or preggos), Emergency Med (they see all the day to day **** primary care docs should be seeing, so yeah, they can trach you and deal with your sinus congestion sniffles). Pediatricians too (do up to 18-21 yo, so they can handle all your day to day stuff too, even DM and HTN these days, not like diseases specific to being seriously old and decrepid). I won't put surgery down until they can prove that they don't need a med consult to handle SSI, haha. Now I'm picking on specialties.
Anyway, these guys would be handy if you were on a plane with chest pain and wanted to know if you needed to land it now or wait. They would be handy if in a nuclear holocaust only they and cockroaches survived. If there's a zombie apocalypse the surgeon might be handier in a pinch, but if you're looking to rebuild the human race one of the above would be good.
The reality is that outside the hospital, the psychiatrist is actually the one best trained to help you and the rest of society with like 90% of all that really ails you. They could probably more effectively help you with your addictions like smoking, drinking, overeating, not exercising, your depression and anxiety, and then basically 90% of the general medicine ward would be empty (reduction in our COPD'ers, ESLD, obesity factoring into DM and MI/CHF)
I would hope that like derm could do basic assessment of chest pain, but sadly, my experience says that is a skill that many have lost.
In my mind, a "real doc's doc" should be able to give you good advice about your head cold and know when chest pain should go to the ED, but that's me and that doesn't mean other docs aren't docs.
And as they say, an artist is only as good as his brush.