A part of the burden of cars is the table stakes though... cars can potentially kill people. A home robot worst-case is a potential pooptastrophe [0] (I guess.. unless people can trip on it and fall down stairs).
Depends on the robot. A mere vacuum cleaner is as you describe, but a fully general household bot could turn a gas hob on without igniting it, combine unsafe combinations of bleach when cleaning the bathroom, fail to recognise when food has expired before cooking it, mistake bleach for a drink when serving dinner, mistake the owner’s fingers for carrot or a sausage when making dinner, or lock one or more doors in an open position overnight.