Why do we want to add more bodies on a finite plane of existence with an infinitely-expanding base (humans)?
We have a finite plane of existence (Earth), with an infinitely-expanding consumer base (humans), and we want to add robotic competition to that finite plane of existence? The data center AI is more appealing (I guess) since it doesn't compete literally shoulder-to-shoulder with me. Why do we want dexterous robots when we have humans?
We show many signs of stopping our infinite expansion.
As for why we want dexterous robots, the obvious answer is to do things that we don't want to do. Things that are back-breaking, disgusting, dangerous, or just plain boring.