All of that might be true, at some point in the future. The future is a very long time. I have no idea how they economy will work 500 years from now. But we can form reasonable opinions about what will happen during the next 10 years.
For all the rhetoric about a productivity revolution thanks to robots and/or AI, we should check in with reality and remember how bleak the present is. Productivity in the USA ran at a high level during the 1940s, 1950s and 1960s, but it stalled out in 1973.
https://www.whitehouse.gov/sites/default/files/docs/20150709...
"Labor productivity in the private nonfarm business sector rose by an average of 2.9 percent per year between 1948 and 1973. Beginning in the earlier 1970s, though, productivity slowed sharply, averaging only 1.5 percent growth between 1973 and 1995. Several factors can help explain the downshift. First, growth in the immediate post-war era benefited from the commercialization of numerous innovations made during World War II, including the jet engine. The early 1970s marked the point at which the wartime innovations became exhausted. Public investment also slowed, and the 1970s oil shocks and collapse of the Bretton Woods system caused dislocations that weighed on growth. "
For awhile, the situation was better in Britain, but since 2008 the situation has been worse. Britain has seen a complete collapse in productivity growth since 2008.
All of this is difficult to reconcile with talk of a revolution in productivity. Maybe that revolution will happen, but as late as 2016, there was no evidence of it in any government statistic, in any of the advanced economies.
It's also worth noting, if we do see uptick in productivity growth (thanks to robots or any other technology) it might simply get us back to the kind of productivity we took for granted during the boom years of the 1940s and 1950s and 1960s. And those were decades of full employment. And that would be awesome.