A robot of any shape or size working on an assembly line in a factory is a difficult but by no means impossible appliance to construct and many are successfully built. With due precautions to protect the humans working alongside them.
Training humans to work safely alongside robots is no easy task as well as proper programming for the robots themselves.
Next then to robots serving humans and specifically humans resident in long term care nursing homes. To perform such duties successfully robots have to perform allotted duties whilst not harming either residents or staff. Moreover and unlike a robot on an assembly line such robots must satisfactorily perform multiple services.
When I think, if at all, of human employees doing various jobs I think of them as very simple. NO NO NO not simple for well instructed robots simple though for human employees (no wonder their union demands adequacy)
Very brave then for some German technicians who have taken on the task.
See: Service Bots