It's Moravac's paradox: Many of the things that are easy for humans (like doing dishes) are still very hard for computers/robots. That is why so far no one has been able to build a robot that can do the things people want help with at home: dishes, laundry, taking out the trash, cleaning. And by cleaning I mean cleaning everything, incl. toilets, window shades, and the shower not just vacuuming and mopping the floor. It's hard enough to build a robot that can do one thing really, really well and 99.9% autonomously, which is why we still see innovation in things like robot vacuuming (see Matic).