I agree with you on your point about robotic manufacturing still requiring people, but I don't think you can say we will always need blue collar workers in fact

I agree with you on your point about robotic manufacturing still requiring people, but I don't think you can say we will always need blue collar workers in factories. Even without strong AI we will there's no reason to assume that robots won't take over practically all blue collar work at some point. I can't say how far into the future that will be, but I can't see any reason to think it won't happen eventually (short of some kind of mass extinction/new dark age/robot apocalypse scenario).