Everything you said is completely right. I personally experienced nearly all of the variants (unforgotten memories, detached emotions, long term, slow trauma, etc.) Some of them were easy, but I'm still struggling with some (That's OK).
However, I want to heavily emphasize that there's no such thing as "poor outcomes are due to poor practice" in our way. I never got that treatment from my masters or my deceased instructor. Same is valid for me. I'd never say something something similar to any of my students.
These students give us all their trust. Their wellbeing is more important than ours during practice and after that. We'd do anything in our capacity to help them, and we have preliminary response protocols if something goes wrong. This brings us to next point of you, which is equally valid.
> I think triage is important, but there is a lot of belief that any practitioner can handle any person.
That's absolutely true. If we sense something is beyond us, we direct our students to medical doctors. If there's an emergency, we directly take them there. Having knowledge of preliminary medical first aid is essential (we have them). Funny thing is, other trainer in my city is an MD. Our master was a field medic.
We neither denounce nor ignore modern medicine. We just can complement in lots of instances or teach people to help themselves. I think it's equally important to know the value and capacity of tradition and accept things evolve and advance.
It's assuring that none of students had any adverse effects or negative events in their life due to practices they made with us. If anything happens, its responsibility is on us, not them. We're showing the way, and we don't have the luxury to make mistakes.