The market exists, does it make financial sense to fill it? Are there enough johnfns out there willing to buy enough of them at high enough of a price to justify the mind-boggling capital required, not to mention the opportunity cost?
Yeah, great. Except we need to unload the dishwasher every day, which takes a lot longer when you have all sorts of kid's cups and bottles. We also need to bring the dishes over, rinse them, put them in, wash the pots & pans by hand along with the high chair's detachable eating area, wash the table, wash the cooking area & counters, and then wash the sink.
A dishwasher saves a lot of time but it certainly doesn't save all of the time.
You could hire someone to clean your house today, you don't need to wait for a robot that might never exist. And it will probably be cheaper too!
If you make a $10,000 robot that can do all of the dishes every damned household with kids in any semi-rich country will get one. A very good portion of our night is spent cleaning up after supper with just two kids, and that's time we can't spend with them. I'd even pay a subscription on top of that $10,000.
If it does laundry too? We'd easily pay $20,000, and we don't have FAANG type salaries.