There will always be some level of unemployment (a percentage of people who want job a won’t have found one), but if automation made the unemployment rate permanently go up, all the people who used to hand knit socks who lost jobs to powered looms, all the people who used to drive plows with oxen who lost jobs to combines, all the blacksmiths who lost jobs to powered forges, and equivalent percentage of the population for subsequent generations forever would remain unemployed. And yet, somehow, subsequent generations have managed to mostly find jobs.