Mostly only when dealing with tools designed for humans, you can generally design the same tools to be more efficient on a general platform base. And even if yo

Mostly only when dealing with tools designed for humans, you can generally design the same tools to be more efficient on a general platform base. And even if you do use them you run into similar problems with task planning and execution. Finally there's power issues with the humanoid shaped bots both in the strength of the actuators (it's hard to have both really strong, fast and precise all in a package that fits) and in providing power to the robot itself. The latter has been the death of many a walking bot intended for the military, batteries don't last long enough and gas power plants are loud and generally bulky.