I worked with PAs and docs both when I was scribing in the ED. You're absolutely right, that with experienced PAs, the docs trusted them to make the right decisions and usually only laid eyes on a PA patients once or twice in a shift - usually when the PA asked for another opinion and talked through the patient with the doc. However, the reason that it worked was because there are 2 very important categories of decisions that the PAs were being trusted to make, that you are leaving out: the decision of which patients to see, and the decision, rarely made but always important, of when the patient would benefit from having care transferred to the doc. Throw in 'when to double check a decision with the doc' for good measure.
When a fresh-out-of-school PA started training in our ED, the docs would look over her patients constantly, reading almost every chart at first. The learning curve for her was...steep, and at the beginning, she absolutely could not be trusted to make the right decisions, on any level. Same as people partway through their medical training, only ostensibly she was ready for practice, having finished PA requirements.
PAs are valuable and competent providers. However, they do not have all of the expertise of the docs and part of what makes a good PA is learning to recognize their strengths and limitations and where they best fit into the workflow of any given practice. You claim to recognize the difference between docs and PAs, but you speak as if ignoring that difference is what makes a good PA. It's not. It's accepting it. I'd advise working on that.