A fundamental illusion in robotics is the belief that improvements in robots will liberate humanity from hazardous and demeaning work.  Engineers are designing only those types of robots that can be properly maintained with the least expensive, least skilled human labor possible. Ttherefore, robots will not eliminate demeaning work -- only substitute one type of demeaning work for another.
The reasoning in the argument is most vulnerable to the criticism that it fails to address the possibility that the amount of demeaning work eliminated by robots might be significantly greater than the amount they create.