Is it defecting if you get a robot to do your dishes, instead of doing them yourself? As you said, it's not taking a job from anyone, just freeing up time for yourself. If anything, this specific use-case sounds like it would be a major boon for nation-wide productivity with little downside.
We have had that for decades, its called a dishwasher. Its so common that its a compound word instead of dish washer. I feel like there are basic concepts of psychology and history that you don't understand if this is the point you want to make.
