There are forms of science that don't involve "arms". Why don't we see a single research paper involving research entirely undertaken by AI? AI development and research itself doesn't need "arms". Why don't we just put AI in a box and let it infintely improve itself? Why doesn't every company that employs someone who just uses a computer replace them with AI? Why are there no businesses entirely run by AIs that just tell humans what to do. Why don't the AIs just use CAD and electronic simulation to design themselves some "arms"? Why can't AI even beat basic videogames that children can beat?

The gap is huge.