It would be useful to people like my wife and I. We have no kids and like living in remote areas. So if a robot could possibly save our lives or drive us to the hospital I'm all for it.
We are pretty solitary people so a robot would be fine. It would be more like a tool so we could keep our independence. It could possibly over time advance enough to run medical test right from your home. So less if any trips to a doctors office.
I know I'm one of the few,but I'm cool with robots and such. Sure they can and will be used for good and evil. The benefits though are worth it.
To have a robot I could reliably leave the house with my wife and know the animals are in 100% safe hands! Not to mention clean, cook,do laundry, make home repairs, act as a physical security system, or preform live saving assistance,go to the grocery store...special car for it would be an add on...lol!
For me personally if something ever happened and it was just me I'd have no choice as to have a robot and smart home. I have no family or anyone to assist me.
All that said I can easily see where a robot wouldn't provide what actual human interactions would.