Except they can't. I get it, merging advanced AI with robotics has made huge leaps in the past few years, but building a truly autonomous laundry robot is an incredibly difficult problem that still feels many years away. And I've seen all the "folding robots" over the past few years, and they are still miles away from being useful in your average home (they only "fold" if pieces are handed to them one-by-one, or the more advanced ones that can pick out clothes from a pile look like they were folded by a 3 year old).

Also, consider that all-in-one washer/dryer combos have existed for a while, but they are still a teeny percentage of washer sales because they're expensive and require more maintenance. There is a surprisingly low threshold on what people are willing to pay for labor saving devices.