All those professions experienced a massive downturn in staff required, but the jobs remained because the technology wasn't good enough that a potential customer could do the high-end tasks by themselves. We're now getting to the point that they can.

I think we will see a couple very big failures when AIs replace people and then we are back to employing people for many of these roles. I don't see any actual need for AIs in many cases, expert systems could do job better and more accurately. And that has been case for decades.

I'm not sure how old you are, but I'm pretty sure no monk was copying books in my lifetime.