I disagree with the general sentiment. What makes humans different is that we can become skilled.

Imagine the big slave population that was used to build the pyramids in ancient Egypt. Suddenly, modern construction machinery appears over there, making them "unemployed" (slaves had a cost too). I would bet only a very very small part of those slaves couldn't be trained to do something more skilled than pushing rocks around.

Unskilled labor, as in repetitive, boring work where little creativity, reasoning, or dexterity is involved, is an infliction humans have to endure, for the moment. It's a waste of our real ability.