Earlier quoted context omitted.
So going to school for a long time to learn an unusual skill well means that your services are more valuable. It's only a rare skill because of licensing/board requirements. I'm fairly certain if you told other people they could make $250k as a radiologist, they could self-teach. The same thing could be said of programming if the only people that could practice had to be certified.
I really, really don't think that's true. Most people are not able to do this, and most of those few who could don't want to put themselves through it. And then separately, how many people would trust a self-taught diagnostician?
Most people don't have to be able to do it, just more than are allowed to do it now, but a factor of say 10.
Furthermore, I don't think people would necessarily need to go through med school and residency.
It's like building a website. There's probably some parallel universe where programming requires certification and only a handful of schools have it. It requires doing MITs SICP as the intro course. Requires compiler construction courses, algorithms, theory of computation and complexity, etc... And then a 4 year apprenticeship with other programmers. And then you can start building webpages, if that's what you want to do.
But we live in a world where it is open and so there's instruction available at many different levels. Would you let someone without a PhD in CS build your website? Of course you would.
And then separately, how many people would trust a self-taught diagnostician?
I trust my car mechanics diagnosis despite the fact I have no idea what level of education he has. But I'm fairly certain he's not an ME from MIT or Berkeley. With good self-study tools, I think that one can self-teach in specialized areas and achieve good mastery rather efficiently. I could imagine Khan Academy for Radiology taught by JHU and Harvard professors to be quite good.