You seem to be arguing that large unemployment rates are logically impossible, so we shouldn't worry about unemployment.
The fact unemployment was 25% during the great depression would seem to suggest that at a minimum, a 25% unemployment rate is possible during a disruptive event.
The unemployment rate in a modern economy is basically whatever the central bank wants it to be. The Great Depression was caused by bad monetary policy - I don't see a reason why having AI would cause that.
