For multi-purpose tasks, human hands and arms are excellent, but only 2 are too few for many tasks. Humans very frequently need to have specialized gripping tools in order to accomplish tasks that cannot be done with only 2 arms, or they must work in pairs.

A good mobile multi-purpose robot should have 3 arms, or 4 arms for symmetry.

Human legs are normally not necessary. A mobile robot would just need some means to raise and lower its wheels, so that it could step when ascending or descending stairs.

A human head is not useful. The place for the "brain" of a robot is in its "chest", because robots do not have the limitations of living beings, where the very slow propagation speed of the nervous signals forces the nervous systems to be concentrated in the proximity of the main sense organs.

Instead of a head, one should have a couple of mobile arms with video cameras at their end, somewhat like the mobile stalks of crab eyes.

Of the components of a human, only the hands and arms are models useful to imitate. Cephalopod-like arms would be even more versatile than human-like arms, but it is likely that they would be much more expensive at similar performances.

Having the size of a human and human-like hands and arms is good for working in environments designed for humans, but having the shape of a human has no purpose.