I don't understand it either.
What is the difference between me using a search engine and using a machine learning tool? The knowledge is external to me in both cases, I am just the interface between business requirements and the technology being used.
If I use an AI to use external knowledge faster then how is this supposed to threaten me? If I am a garbage scavenger and I get my resources from digging in the landfill, then wouldn't a robot that detects the valuable waste make me wealthier? I still have to pull it out myself. Ok next iteration there is a robot that can take the garbage out the land fill but not to my house. Ok next iteration is a self driving robot that can also transport the garbage to my home where I sell it. Ok next iteration the robot sells my garbage.
The real question in this situation is, does the robot cost me more than I get out of it?