We've built zillions of machines to automate tasks previously done by humans (or animals) and how many times did we design something based on humans work? Roughly zeroish? People used to do laundry with wash basin and a river, now it's a metal cube. People wash dishes with a sponge and a towel but the machine is a metal cube. People would cook over burning wood and now it's a metal cube.

Much smaller robots will co-exist in a world with humans a lot more smoothly than anything human shaped & sized.