I agree with most of your post. To play devils advocate though I’d argue that placing a central line is pretty much never needed emergently. Peripheral pressors. IO/PIV/EJ for quick access/resuscitation. I agree you notice skill deficiencies in those that can’t place a central line quickly or actively avoid placing them. However, when have you taken care of someone actively dying where a central line was the one thing that would have saved their life (more of a general question for all)?
I don't like IO's. I know people who swear by them, and I've heard all the hype since residency. However, for me, if I have a crashing hypotensive patient, I want IV access to push fluids. I often do find that central line access is a turning point in patient care. Now, I got three solid lines to push stuff through. For me, that's a game-changer.
As for PIV and EJ, I find these to require a higher level of skill than central line, which takes longer to do but is easier to do (or, at least, has a higher rate of success for me).
Easy-IJ is an option, but again, if you are a thousand percent comfortable doing a central line, you're good as far as access is concerned. Everything else is cherry on top. For a non-ABEM person, I'd just stress intubation and central line...
Also, the other day I had a lady who was signed out to me who had a history of mesenteric ischemia and needed a scan with contrast... Apparently, she had been poked a million times with no success. Therefore, I decided to do a central line on her. I was told by the radiology tech that EJ or easy-IJ were not an option but central line would be fine.
I ended up getting the PIV using ultrasound, but nonetheless, had this not been the case, central line was an option. A bit crazy, of course, to do a central line for contrast, which is why I got the PIV, but nonetheless...
Speaking of, the provider before me was a non-ABEM doc who did not know how to use ultrasound at all. Nice guy, though. I guess that's why I got a soft spot for them, haha.