I'm not so sure. If you could rebuild every human space and tool from scratch, you are probably right. However, we live in buildings filled with stairs. We've got tall cabinets with things tucked in them. We've got lawn mowers and snow blowers and leaf blowers and cars. Making a humanoid robot is a much harder problem if you want a cool demo. If you actually want to deploy robots in billions of homes, it might just be the only answer.

Just have to be compatible?

The xiaomi-robotics-1 concept is but one that seems very doable and very near term.

https://robotics.xiaomi.com/xiaomi-robotics-1.html