Robots don't need to be perfect, they just need to be better than the average human. As with most lines of work, there is going to perdure a transition period between full human labor and full robot labor in which both coexist, before full automation. Besides, if they are not there right now yet, it is only a matter of time until they are and the time frame is in years and decades at most, not centuries.

I don't understand your point.