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 assumes what it sets out to prove, that robots create demeaning work.