I don’t think this is where the robotics revolution is going to happen. The big one will be using AI to design and build highly specialized robots to automate mining and manufacturing.
Seems to me you'd do better if you built the robots with robots that were specialized in building robots.
Also, no one said it could male any robot until you tried to broaden the scope just now because you didn't want to admit you're wrong. This is an example of "bad faith" in a discussion.
Reconfiguring the assembly line to produce a different car requires people or general purpose robots.
Not to say we won't get humanoid robots eventually, but I think there's probably some low hanging fruit for people to make some other kinds of solutions. Specialized robots for industrial environment, well-thought out appliances for the home.
It would be a bit surprising if the progression was Roomba -> humanoid robot.