I don't disagree with you, but part of what has gotten us to this point is that the "thought leaders" in pediatrics training have a wildly skewed view of how ready graduating residents are.
I've said this many times before, but I believe that the top children's hospitals have painted themselves in to a corner (not on purpose) by becoming quartenary or quintenary referral centers, such that a larger proportion of their patients far exceed what a regular general pediatrician needs to know. As such, they are fabulous places for fellows to train but the patients on many services are too complex for the peds residents to have any autonomy on. And while some people at these institutions will inevitably shout "we have bronchiolitics too!", the truth of the matter is that the culture of these locations has made it so that there's no incentive for residents to be autonomous even on the patients they should be able to manage without much difficulty. They residents also get bombarded with zebras and as such begin to think about those things much more frequently as possible diagnoses, which then brings in more consultants, and further abdication of the workup.
The result is that you have a whole bunch of very smart people graduating "The BEST*" </sarcasm> peds residencies ill-prepared for independent decision making. The medical education gurus run their projects on this group of residents, the results ignore the culture, and the conclusions end up being that the only answer is for more training, more education all with extended supervision.
There are programs out there that do encourage autonomy, maybe not to the extent of IM programs, but certainly that acknowledge what the end result of their program should be - individuals ready to be independent pediatricians, or capable fellows with a good understanding of general pediatrics. For example (just one of several) at my residency program (large free-standing program that took 25+ interns/yr, but by no means gets mentioned as a "big name"), interns always had to put in UVC/UAC in the NICU, and you got taught by your upper level resident how to do them, often with the admonishment that "pay attention and figure it out because next year you'll have to teach the interns", fellows only came to put in lines after the intern and resident had failed. The attendings frequently mentioned how important it was for everyone to know how to do lines because if someone went out to a rural part of the state, they might end up attending deliveries and needing to know how to do it, so again the reinforcement made it clear why it was an expectation.
Compare that to
@SurfingDoctor 's PICU where residents begged off of writing daily progress notes - I can't imagine how that creates patient ownership and the ability to understand the day to day management. When I interviewed a decade ago for residencies I remember that some programs had suture techs and splinting techs in their ED's that got promoted as "that way you can focus on the sick kids", but nevermind that suturing and splinting are highly useful (and billable) skills for the general pediatrician. Again, it's not hard to foresee some program director thinking "if they want to learn those skills, they should go into a PEM fellowship...or maybe we could tack that on to our cutting edge outpatient pediatrics fellowship we're creating."
The question then becomes how is the cycle broken? You have to get a spot at the table with the decision makers, but to get a spot you need to be well regarded, which generally means your academic pedigree includes the very locations that produce these inadequately trained residents. It's a self-perpetuating cycle that lacks a clear answer