I imagine radiologists are interchangeable in the same way that Python programmers are; kind of but not really.
Skilled professionals become more experienced at their jobs over time, they also have differing experiences and may have graduated from different schools etc.
This means that they will perform their jobs differently in ways that way be subtle and not easily quantifiable. So if you swap them out, things will change in ways that may not be easy to predict.
On the other hand a minimum wage worker is more likely to perform a job that requires a total training of 1 hour or less and they are likely to hit a ceiling in terms of productivity within a week. There may be minor differences in output, but these are easily quantifiable and if you have a large enough labour pool to draw from can be solved by saying "fire anybody who does like than X per hour".
I'd actually expect radiologists to be considerably more interchangeable. The goal of a radiologist is to compute a function - `isCancer(mri)` or `isBrokenBone(xray)`. As a thought experiment, consider two radiologists who are as accurate as physics allows - they will always return the same answer for `isHerniatedDisk(mri)`.
Medicine is high skill, but the outputs are fairly homogeneous. Homogeneous output is what makes workers interchangeable cogs, not skill level.
It seems to me (corrections welcome), that medical specialists are way, way more interchangeable than programmers. Each patient has a chart that follows them around through the hospital and each specialist reads the chart, makes their decisions and documents what they're doing. There are problems with that, but it's the system. That very much makes the medical practitioners cogs in the system, compared to programmers who have a much longer ramp up time for a given codebase/patient.
Sure and every codebase has documentation , specs and tests that follow it all over the internet..
I think the main difference probably comes down to medicine having more procedures and redundancy built in because you can't let a patient die when a particular doctor is not available.
OTOH my older relatives definitely complain about/praise individual doctors for bedside manor , professionalism and misdiagnosis etc.
Skilled professionals become more experienced at their jobs over time, they also have differing experiences and may have graduated from different schools etc.
This means that they will perform their jobs differently in ways that way be subtle and not easily quantifiable. So if you swap them out, things will change in ways that may not be easy to predict.
On the other hand a minimum wage worker is more likely to perform a job that requires a total training of 1 hour or less and they are likely to hit a ceiling in terms of productivity within a week. There may be minor differences in output, but these are easily quantifiable and if you have a large enough labour pool to draw from can be solved by saying "fire anybody who does like than X per hour".