Sorry :). I'll leave that to Skynet ;).
> The point is that even when automation "almost completely eliminated" the first type, unemployment did not skyrocket.
Yeah, the labor pool moved to the service / cognitive jobs. With automation taking big bites off services and mental work, where should the labor pool move next? Now, I know there's a lot of place in marketing and all kind of bullshit jobs, but it surely has its limits, if not economical then those of mental health - bullshit jobs aren't exactly good for one's self-esteem.
That lots of humans are required to work the land, or that the horses are important for logistics and transporting people were both well-documented and established facts for many thousand years. Until at some point, they stopped being true.