On HN, we are supposed to respond to the strongest interpretation of a comment.

CNC machines add capabilities that are not possible by hand. In these shops, you might see deburring done as an extension of the machine cycle where labor cost is high, but by hand where it is low.

GP is right that automation is a huge commitment in design and manufacture. If there are any finicky parts, it's likely that humans will have to do or correct the robot's job, and now you have an idle robot and an engaged human.