Robotics is hard.

Every unit must behave reliably after it leaves the clean geometry of the production line.

Cars repeat a narrow task inside a heavily engineered road system, while humanoid robots are being asked to generalize across spaces that were designed for human bodies, human judgment, and human tolerance for failure.

A robot must survive contact with kitchens, stairs, tools, dust, people, hesitation, bad lighting, dropped objects, and all the small chaos that factories spend decades trying to remove.