Lester Thurow, a pretty left liberal economist, pointed out that women's "liberation" and entrance into the general workforce had starved teaching/education of the pool of talented women that had previously kept the quality of education very high. (His mother had been a teacher.)
I (who had studied econ so I tend to think about it) noticed at the dawn of the dot-com boom how much of industry is completely discretionary even though it seems serious and important. Whatever we were all doing before, it got dropped so we could all rush into the internet. The software industry, which was not small, suddenly changed its focus, all previous projects dropped, because those projects were suddenly starved of capital, workers, and attention.
In terms of doctors, I think there is a counterbalancing effect of sorts, whereby some administration can be digitised and communication is more efficient, but it probably doesn't make up for the lack of additional candidates.
freeing up that many knowledge workers to do other things will grow the economy, not shrink it, a new industrial revolution