So, car factories have used custom built robots on assembly lines for decades, I want to say close to a half century? Why on earth would anybody want to replace those with humanoid robots other than, I dunno, having severed ties with reality to live out his days in a deluded fantasy?
This is as great example of Musk's """genius""" as that time he decided to move a Twitter data centre with the help of his own incapable hands, a cousin and some homeless people.